Clean up feature flag for mount hooks on Android (#44206)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/44206

Changelog: [internal]

We finally managed to implement mount hooks without reliability issues on Android, so we can clean up the feature flag and enable it unconditionally.

Reviewed By: cortinico

Differential Revision: D56467379

fbshipit-source-id: d797ec770b731135332bc9f39df1c1e684b3bde4

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/fabric/FabricUIManager.java

@@ -1233,9 +1233,7 @@ public class FabricUIManager implements UIManager, LifecycleEventListener, UIBlo
         listener.didMountItems(FabricUIManager.this);
       }
 
-      if (!ReactNativeFeatureFlags.enableMountHooksAndroid()
-          || mountItems == null
-          || mountItems.isEmpty()) {
+      if (mountItems == null || mountItems.isEmpty()) {
         return;
       }
 

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/internal/featureflags/ReactNativeFeatureFlags.kt

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<61b929b9624eeaedfa12d2f390299447>>
+ * @generated SignedSource<<8915b173bf7bc423cff555366f522615>>
  */
 
 /**
@@ -64,12 +64,6 @@ public object ReactNativeFeatureFlags {
   @JvmStatic
   public fun enableMicrotasks(): Boolean = accessor.enableMicrotasks()
 
-  /**
-   * Enables the notification of mount operations to mount hooks on Android.
-   */
-  @JvmStatic
-  public fun enableMountHooksAndroid(): Boolean = accessor.enableMountHooksAndroid()
-
   /**
    * Uses new, deduplicated logic for constructing Android Spannables from text fragments
    */

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/internal/featureflags/ReactNativeFeatureFlagsCxxAccessor.kt

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<46e1a8dd088d588ea9eec703d7155710>>
+ * @generated SignedSource<<f7e306b346e95ea68be34c7d7708c316>>
  */
 
 /**
@@ -26,7 +26,6 @@ public class ReactNativeFeatureFlagsCxxAccessor : ReactNativeFeatureFlagsAccesso
   private var enableCleanTextInputYogaNodeCache: Boolean? = null
   private var enableCustomDrawOrderFabricCache: Boolean? = null
   private var enableMicrotasksCache: Boolean? = null
-  private var enableMountHooksAndroidCache: Boolean? = null
   private var enableSpannableBuildingUnificationCache: Boolean? = null
   private var enableSynchronousStateUpdatesCache: Boolean? = null
   private var enableUIConsistencyCache: Boolean? = null
@@ -92,15 +91,6 @@ public class ReactNativeFeatureFlagsCxxAccessor : ReactNativeFeatureFlagsAccesso
     return cached
   }
 
-  override fun enableMountHooksAndroid(): Boolean {
-    var cached = enableMountHooksAndroidCache
-    if (cached == null) {
-      cached = ReactNativeFeatureFlagsCxxInterop.enableMountHooksAndroid()
-      enableMountHooksAndroidCache = cached
-    }
-    return cached
-  }
-
   override fun enableSpannableBuildingUnification(): Boolean {
     var cached = enableSpannableBuildingUnificationCache
     if (cached == null) {

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/internal/featureflags/ReactNativeFeatureFlagsCxxInterop.kt

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<56ac4a5eaf65775fdb757fc10ed82908>>
+ * @generated SignedSource<<43d74c7b95ae537455e1aafe7daeb397>>
  */
 
 /**
@@ -40,8 +40,6 @@ public object ReactNativeFeatureFlagsCxxInterop {
 
   @DoNotStrip @JvmStatic public external fun enableMicrotasks(): Boolean
 
-  @DoNotStrip @JvmStatic public external fun enableMountHooksAndroid(): Boolean
-
   @DoNotStrip @JvmStatic public external fun enableSpannableBuildingUnification(): Boolean
 
   @DoNotStrip @JvmStatic public external fun enableSynchronousStateUpdates(): Boolean

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/internal/featureflags/ReactNativeFeatureFlagsDefaults.kt

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<6cc4fccd13a1e426a2d6a2a24530e5e6>>
+ * @generated SignedSource<<c6c02b3249add27dd868af02151235aa>>
  */
 
 /**
@@ -35,8 +35,6 @@ public open class ReactNativeFeatureFlagsDefaults : ReactNativeFeatureFlagsProvi
 
   override fun enableMicrotasks(): Boolean = false
 
-  override fun enableMountHooksAndroid(): Boolean = false
-
   override fun enableSpannableBuildingUnification(): Boolean = false
 
   override fun enableSynchronousStateUpdates(): Boolean = false

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/internal/featureflags/ReactNativeFeatureFlagsLocalAccessor.kt

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<c1c7546acade83cf63f3c06e78352982>>
+ * @generated SignedSource<<919173dae59866dbd93ccbfa3a7f9118>>
  */
 
 /**
@@ -30,7 +30,6 @@ public class ReactNativeFeatureFlagsLocalAccessor : ReactNativeFeatureFlagsAcces
   private var enableCleanTextInputYogaNodeCache: Boolean? = null
   private var enableCustomDrawOrderFabricCache: Boolean? = null
   private var enableMicrotasksCache: Boolean? = null
-  private var enableMountHooksAndroidCache: Boolean? = null
   private var enableSpannableBuildingUnificationCache: Boolean? = null
   private var enableSynchronousStateUpdatesCache: Boolean? = null
   private var enableUIConsistencyCache: Boolean? = null
@@ -102,16 +101,6 @@ public class ReactNativeFeatureFlagsLocalAccessor : ReactNativeFeatureFlagsAcces
     return cached
   }
 
-  override fun enableMountHooksAndroid(): Boolean {
-    var cached = enableMountHooksAndroidCache
-    if (cached == null) {
-      cached = currentProvider.enableMountHooksAndroid()
-      accessedFeatureFlags.add("enableMountHooksAndroid")
-      enableMountHooksAndroidCache = cached
-    }
-    return cached
-  }
-
   override fun enableSpannableBuildingUnification(): Boolean {
     var cached = enableSpannableBuildingUnificationCache
     if (cached == null) {

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/internal/featureflags/ReactNativeFeatureFlagsProvider.kt

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<a5cbe59693a5f7d64af6e004951ab971>>
+ * @generated SignedSource<<a022c7f29ebb4b7351253a32efe6203a>>
  */
 
 /**
@@ -35,8 +35,6 @@ public interface ReactNativeFeatureFlagsProvider {
 
   @DoNotStrip public fun enableMicrotasks(): Boolean
 
-  @DoNotStrip public fun enableMountHooksAndroid(): Boolean
-
   @DoNotStrip public fun enableSpannableBuildingUnification(): Boolean
 
   @DoNotStrip public fun enableSynchronousStateUpdates(): Boolean

packages/react-native/ReactAndroid/src/main/jni/react/featureflags/JReactNativeFeatureFlagsCxxInterop.cpp

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<f8ac6f7e857808ade5d0f26ec7924604>>
+ * @generated SignedSource<<63bb565e7ab5a1e16ce5f9a7d0b93303>>
  */
 
 /**
@@ -75,12 +75,6 @@ class ReactNativeFeatureFlagsProviderHolder
     return method(javaProvider_);
   }
 
-  bool enableMountHooksAndroid() override {
-    static const auto method =
-        getReactNativeFeatureFlagsProviderJavaClass()->getMethod<jboolean()>("enableMountHooksAndroid");
-    return method(javaProvider_);
-  }
-
   bool enableSpannableBuildingUnification() override {
     static const auto method =
         getReactNativeFeatureFlagsProviderJavaClass()->getMethod<jboolean()>("enableSpannableBuildingUnification");
@@ -175,11 +169,6 @@ bool JReactNativeFeatureFlagsCxxInterop::enableMicrotasks(
   return ReactNativeFeatureFlags::enableMicrotasks();
 }
 
-bool JReactNativeFeatureFlagsCxxInterop::enableMountHooksAndroid(
-    facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop> /*unused*/) {
-  return ReactNativeFeatureFlags::enableMountHooksAndroid();
-}
-
 bool JReactNativeFeatureFlagsCxxInterop::enableSpannableBuildingUnification(
     facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop> /*unused*/) {
   return ReactNativeFeatureFlags::enableSpannableBuildingUnification();
@@ -265,9 +254,6 @@ void JReactNativeFeatureFlagsCxxInterop::registerNatives() {
       makeNativeMethod(
         "enableMicrotasks",
         JReactNativeFeatureFlagsCxxInterop::enableMicrotasks),
-      makeNativeMethod(
-        "enableMountHooksAndroid",
-        JReactNativeFeatureFlagsCxxInterop::enableMountHooksAndroid),
       makeNativeMethod(
         "enableSpannableBuildingUnification",
         JReactNativeFeatureFlagsCxxInterop::enableSpannableBuildingUnification),

packages/react-native/ReactAndroid/src/main/jni/react/featureflags/JReactNativeFeatureFlagsCxxInterop.h

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<a6b8839cf6f9e87848289a8c5c37a5c8>>
+ * @generated SignedSource<<c676d8771641013158d8b07a19ba556b>>
  */
 
 /**
@@ -48,9 +48,6 @@ class JReactNativeFeatureFlagsCxxInterop
   static bool enableMicrotasks(
     facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop>);
 
-  static bool enableMountHooksAndroid(
-    facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop>);
-
   static bool enableSpannableBuildingUnification(
     facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop>);
 

packages/react-native/ReactCommon/react/featureflags/ReactNativeFeatureFlags.cpp

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<0fe73e0526dbc2f860029b8cb0fbcfe3>>
+ * @generated SignedSource<<e0775f2263b3a9dd8e69dde74557ba2a>>
  */
 
 /**
@@ -45,10 +45,6 @@ bool ReactNativeFeatureFlags::enableMicrotasks() {
   return getAccessor().enableMicrotasks();
 }
 
-bool ReactNativeFeatureFlags::enableMountHooksAndroid() {
-  return getAccessor().enableMountHooksAndroid();
-}
-
 bool ReactNativeFeatureFlags::enableSpannableBuildingUnification() {
   return getAccessor().enableSpannableBuildingUnification();
 }

packages/react-native/ReactCommon/react/featureflags/ReactNativeFeatureFlags.h

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<d6a33b997461fd186c58a956f6854aca>>
+ * @generated SignedSource<<89f6dda7de10b5dab880ffc2908248f6>>
  */
 
 /**
@@ -67,11 +67,6 @@ class ReactNativeFeatureFlags {
    */
   RN_EXPORT static bool enableMicrotasks();
 
-  /**
-   * Enables the notification of mount operations to mount hooks on Android.
-   */
-  RN_EXPORT static bool enableMountHooksAndroid();
-
   /**
    * Uses new, deduplicated logic for constructing Android Spannables from text fragments
    */

packages/react-native/ReactCommon/react/featureflags/ReactNativeFeatureFlagsAccessor.cpp

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<f77452d93caa28c074c6ba8595572e6c>>
+ * @generated SignedSource<<faf050dbfb7102fc9f057e548aec6793>>
  */
 
 /**
@@ -137,24 +137,6 @@ bool ReactNativeFeatureFlagsAccessor::enableMicrotasks() {
   return flagValue.value();
 }
 
-bool ReactNativeFeatureFlagsAccessor::enableMountHooksAndroid() {
-  auto flagValue = enableMountHooksAndroid_.load();
-
-  if (!flagValue.has_value()) {
-    // This block is not exclusive but it is not necessary.
-    // If multiple threads try to initialize the feature flag, we would only
-    // be accessing the provider multiple times but the end state of this
-    // instance and the returned flag value would be the same.
-
-    markFlagAsAccessed(6, "enableMountHooksAndroid");
-
-    flagValue = currentProvider_->enableMountHooksAndroid();
-    enableMountHooksAndroid_ = flagValue;
-  }
-
-  return flagValue.value();
-}
-
 bool ReactNativeFeatureFlagsAccessor::enableSpannableBuildingUnification() {
   auto flagValue = enableSpannableBuildingUnification_.load();
 
@@ -164,7 +146,7 @@ bool ReactNativeFeatureFlagsAccessor::enableSpannableBuildingUnification() {
     // be accessing the provider multiple times but the end state of this
     // instance and the returned flag value would be the same.
 
-    markFlagAsAccessed(7, "enableSpannableBuildingUnification");
+    markFlagAsAccessed(6, "enableSpannableBuildingUnification");
 
     flagValue = currentProvider_->enableSpannableBuildingUnification();
     enableSpannableBuildingUnification_ = flagValue;
@@ -182,7 +164,7 @@ bool ReactNativeFeatureFlagsAccessor::enableSynchronousStateUpdates() {
     // be accessing the provider multiple times but the end state of this
     // instance and the returned flag value would be the same.
 
-    markFlagAsAccessed(8, "enableSynchronousStateUpdates");
+    markFlagAsAccessed(7, "enableSynchronousStateUpdates");
 
     flagValue = currentProvider_->enableSynchronousStateUpdates();
     enableSynchronousStateUpdates_ = flagValue;
@@ -200,7 +182,7 @@ bool ReactNativeFeatureFlagsAccessor::enableUIConsistency() {
     // be accessing the provider multiple times but the end state of this
     // instance and the returned flag value would be the same.
 
-    markFlagAsAccessed(9, "enableUIConsistency");
+    markFlagAsAccessed(8, "enableUIConsistency");
 
     flagValue = currentProvider_->enableUIConsistency();
     enableUIConsistency_ = flagValue;
@@ -218,7 +200,7 @@ bool ReactNativeFeatureFlagsAccessor::forceBatchingMountItemsOnAndroid() {
     // be accessing the provider multiple times but the end state of this
     // instance and the returned flag value would be the same.
 
-    markFlagAsAccessed(10, "forceBatchingMountItemsOnAndroid");
+    markFlagAsAccessed(9, "forceBatchingMountItemsOnAndroid");
 
     flagValue = currentProvider_->forceBatchingMountItemsOnAndroid();
     forceBatchingMountItemsOnAndroid_ = flagValue;
@@ -236,7 +218,7 @@ bool ReactNativeFeatureFlagsAccessor::inspectorEnableCxxInspectorPackagerConnect
     // be accessing the provider multiple times but the end state of this
     // instance and the returned flag value would be the same.
 
-    markFlagAsAccessed(11, "inspectorEnableCxxInspectorPackagerConnection");
+    markFlagAsAccessed(10, "inspectorEnableCxxInspectorPackagerConnection");
 
     flagValue = currentProvider_->inspectorEnableCxxInspectorPackagerConnection();
     inspectorEnableCxxInspectorPackagerConnection_ = flagValue;
@@ -254,7 +236,7 @@ bool ReactNativeFeatureFlagsAccessor::inspectorEnableModernCDPRegistry() {
     // be accessing the provider multiple times but the end state of this
     // instance and the returned flag value would be the same.
 
-    markFlagAsAccessed(12, "inspectorEnableModernCDPRegistry");
+    markFlagAsAccessed(11, "inspectorEnableModernCDPRegistry");
 
     flagValue = currentProvider_->inspectorEnableModernCDPRegistry();
     inspectorEnableModernCDPRegistry_ = flagValue;
@@ -272,7 +254,7 @@ bool ReactNativeFeatureFlagsAccessor::preventDoubleTextMeasure() {
     // be accessing the provider multiple times but the end state of this
     // instance and the returned flag value would be the same.
 
-    markFlagAsAccessed(13, "preventDoubleTextMeasure");
+    markFlagAsAccessed(12, "preventDoubleTextMeasure");
 
     flagValue = currentProvider_->preventDoubleTextMeasure();
     preventDoubleTextMeasure_ = flagValue;
@@ -290,7 +272,7 @@ bool ReactNativeFeatureFlagsAccessor::useModernRuntimeScheduler() {
     // be accessing the provider multiple times but the end state of this
     // instance and the returned flag value would be the same.
 
-    markFlagAsAccessed(14, "useModernRuntimeScheduler");
+    markFlagAsAccessed(13, "useModernRuntimeScheduler");
 
     flagValue = currentProvider_->useModernRuntimeScheduler();
     useModernRuntimeScheduler_ = flagValue;
@@ -308,7 +290,7 @@ bool ReactNativeFeatureFlagsAccessor::useNativeViewConfigsInBridgelessMode() {
     // be accessing the provider multiple times but the end state of this
     // instance and the returned flag value would be the same.
 
-    markFlagAsAccessed(15, "useNativeViewConfigsInBridgelessMode");
+    markFlagAsAccessed(14, "useNativeViewConfigsInBridgelessMode");
 
     flagValue = currentProvider_->useNativeViewConfigsInBridgelessMode();
     useNativeViewConfigsInBridgelessMode_ = flagValue;
@@ -326,7 +308,7 @@ bool ReactNativeFeatureFlagsAccessor::useStateAlignmentMechanism() {
     // be accessing the provider multiple times but the end state of this
     // instance and the returned flag value would be the same.
 
-    markFlagAsAccessed(16, "useStateAlignmentMechanism");
+    markFlagAsAccessed(15, "useStateAlignmentMechanism");
 
     flagValue = currentProvider_->useStateAlignmentMechanism();
     useStateAlignmentMechanism_ = flagValue;

packages/react-native/ReactCommon/react/featureflags/ReactNativeFeatureFlagsAccessor.h

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<2ac50c51832dfbcebfc8875c02738727>>
+ * @generated SignedSource<<7ec1c929562737037ff524a042bbcf54>>
  */
 
 /**
@@ -37,7 +37,6 @@ class ReactNativeFeatureFlagsAccessor {
   bool enableCleanTextInputYogaNode();
   bool enableCustomDrawOrderFabric();
   bool enableMicrotasks();
-  bool enableMountHooksAndroid();
   bool enableSpannableBuildingUnification();
   bool enableSynchronousStateUpdates();
   bool enableUIConsistency();
@@ -58,7 +57,7 @@ class ReactNativeFeatureFlagsAccessor {
   std::unique_ptr<ReactNativeFeatureFlagsProvider> currentProvider_;
   bool wasOverridden_;
 
-  std::array<std::atomic<const char*>, 17> accessedFeatureFlags_;
+  std::array<std::atomic<const char*>, 16> accessedFeatureFlags_;
 
   std::atomic<std::optional<bool>> commonTestFlag_;
   std::atomic<std::optional<bool>> batchRenderingUpdatesInEventLoop_;
@@ -66,7 +65,6 @@ class ReactNativeFeatureFlagsAccessor {
   std::atomic<std::optional<bool>> enableCleanTextInputYogaNode_;
   std::atomic<std::optional<bool>> enableCustomDrawOrderFabric_;
   std::atomic<std::optional<bool>> enableMicrotasks_;
-  std::atomic<std::optional<bool>> enableMountHooksAndroid_;
   std::atomic<std::optional<bool>> enableSpannableBuildingUnification_;
   std::atomic<std::optional<bool>> enableSynchronousStateUpdates_;
   std::atomic<std::optional<bool>> enableUIConsistency_;

packages/react-native/ReactCommon/react/featureflags/ReactNativeFeatureFlagsDefaults.h

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<b638a8d33a5b542e93b1bfa784ff500d>>
+ * @generated SignedSource<<a4f3d7d441089e7f8f95c19c463c038d>>
  */
 
 /**
@@ -51,10 +51,6 @@ class ReactNativeFeatureFlagsDefaults : public ReactNativeFeatureFlagsProvider {
     return false;
   }
 
-  bool enableMountHooksAndroid() override {
-    return false;
-  }
-
   bool enableSpannableBuildingUnification() override {
     return false;
   }

packages/react-native/ReactCommon/react/featureflags/ReactNativeFeatureFlagsProvider.h

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<2ffedc198d97593ae8c5d5300aa640a2>>
+ * @generated SignedSource<<c488fb453099ed668382fb8cf8af962f>>
  */
 
 /**
@@ -31,7 +31,6 @@ class ReactNativeFeatureFlagsProvider {
   virtual bool enableCleanTextInputYogaNode() = 0;
   virtual bool enableCustomDrawOrderFabric() = 0;
   virtual bool enableMicrotasks() = 0;
-  virtual bool enableMountHooksAndroid() = 0;
   virtual bool enableSpannableBuildingUnification() = 0;
   virtual bool enableSynchronousStateUpdates() = 0;
   virtual bool enableUIConsistency() = 0;

packages/react-native/ReactCommon/react/nativemodule/featureflags/NativeReactNativeFeatureFlags.cpp

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<a24c9972eebff849abd9b0e7ef4ff525>>
+ * @generated SignedSource<<f32cab91b22bccace4e23b996ef1609c>>
  */
 
 /**
@@ -67,11 +67,6 @@ bool NativeReactNativeFeatureFlags::enableMicrotasks(
   return ReactNativeFeatureFlags::enableMicrotasks();
 }
 
-bool NativeReactNativeFeatureFlags::enableMountHooksAndroid(
-    jsi::Runtime& /*runtime*/) {
-  return ReactNativeFeatureFlags::enableMountHooksAndroid();
-}
-
 bool NativeReactNativeFeatureFlags::enableSpannableBuildingUnification(
     jsi::Runtime& /*runtime*/) {
   return ReactNativeFeatureFlags::enableSpannableBuildingUnification();

packages/react-native/ReactCommon/react/nativemodule/featureflags/NativeReactNativeFeatureFlags.h

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<92830e364788db00fd06d4e152ef7727>>
+ * @generated SignedSource<<5d7f748ee93a70ac0bfe378e892c1051>>
  */
 
 /**
@@ -47,8 +47,6 @@ class NativeReactNativeFeatureFlags
 
   bool enableMicrotasks(jsi::Runtime& runtime);
 
-  bool enableMountHooksAndroid(jsi::Runtime& runtime);
-
   bool enableSpannableBuildingUnification(jsi::Runtime& runtime);
 
   bool enableSynchronousStateUpdates(jsi::Runtime& runtime);

packages/react-native/scripts/featureflags/ReactNativeFeatureFlags.config.js

@@ -56,11 +56,6 @@ const definitions: FeatureFlagDefinitions = {
       description:
         'Enables the use of microtasks in Hermes (scheduling) and RuntimeScheduler (execution).',
     },
-    enableMountHooksAndroid: {
-      defaultValue: false,
-      description:
-        'Enables the notification of mount operations to mount hooks on Android.',
-    },
     enableSpannableBuildingUnification: {
       defaultValue: false,
       description:

packages/react-native/src/private/featureflags/ReactNativeFeatureFlags.js

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<0e0858557eb27f3eebfecae18ee13c0b>>
+ * @generated SignedSource<<62830c2a4eb13efee6abea1822f4cf1c>>
  * @flow strict-local
  */
 
@@ -46,7 +46,6 @@ export type ReactNativeFeatureFlags = {
   enableCleanTextInputYogaNode: Getter<boolean>,
   enableCustomDrawOrderFabric: Getter<boolean>,
   enableMicrotasks: Getter<boolean>,
-  enableMountHooksAndroid: Getter<boolean>,
   enableSpannableBuildingUnification: Getter<boolean>,
   enableSynchronousStateUpdates: Getter<boolean>,
   enableUIConsistency: Getter<boolean>,
@@ -123,10 +122,6 @@ export const enableCustomDrawOrderFabric: Getter<boolean> = createNativeFlagGett
  * Enables the use of microtasks in Hermes (scheduling) and RuntimeScheduler (execution).
  */
 export const enableMicrotasks: Getter<boolean> = createNativeFlagGetter('enableMicrotasks', false);
-/**
- * Enables the notification of mount operations to mount hooks on Android.
- */
-export const enableMountHooksAndroid: Getter<boolean> = createNativeFlagGetter('enableMountHooksAndroid', false);
 /**
  * Uses new, deduplicated logic for constructing Android Spannables from text fragments
  */

packages/react-native/src/private/featureflags/specs/NativeReactNativeFeatureFlags.js

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<4ba909c3b360c6a4fc9c6ed5996b6a13>>
+ * @generated SignedSource<<2db7341f650d61fce96356d75231f44a>>
  * @flow strict-local
  */
 
@@ -29,7 +29,6 @@ export interface Spec extends TurboModule {
   +enableCleanTextInputYogaNode?: () => boolean;
   +enableCustomDrawOrderFabric?: () => boolean;
   +enableMicrotasks?: () => boolean;
-  +enableMountHooksAndroid?: () => boolean;
   +enableSpannableBuildingUnification?: () => boolean;
   +enableSynchronousStateUpdates?: () => boolean;
   +enableUIConsistency?: () => boolean;