Revert "Make enableSuspenseLayoutEffectSemantics static for www (#21617)" (#21656)

This reverts commit 39f0074892.

packages/shared/forks/ReactFeatureFlags.www.js

@@ -26,6 +26,7 @@ export const {
   enableDebugTracing,
   skipUnmountedBoundaries,
   createRootStrictEffectsByDefault,
+  enableSuspenseLayoutEffectSemantics,
   enableUseRefAccessWarning,
   disableNativeComponentFrames,
   disableSchedulerTimeoutInWorkLoop,
@@ -37,8 +38,6 @@ export const {
 // On WWW, __EXPERIMENTAL__ is used for a new modern build.
 // It's not used anywhere in production yet.
 
-export const enableSuspenseLayoutEffectSemantics = true;
-
 export const enableStrictEffects =
   __DEV__ && dynamicFeatureFlags.enableStrictEffects;
 export const debugRenderPhaseSideEffectsForStrictMode = __DEV__;