Remove atomic fix

Summary:
Changelog:
[Android][Changed] - Remove testing code for atomic fix

Reviewed By: fkgozali

Differential Revision: D41730846

fbshipit-source-id: e73e3b9530969683d4247759f3923f105d79cd34

ReactAndroid/src/main/java/com/facebook/react/config/ReactFeatureFlags.java

@@ -104,9 +104,6 @@ public class ReactFeatureFlags {
   /** Temporary flag to allow execution of mount items up to 15ms earlier than normal. */
   public static boolean enableEarlyScheduledMountItemExecution = false;
 
-  // TODO (T136375139): Remove this once finish testing
-  public static boolean enableAtomicRegisterSegment = false;
-
   /**
    * Allow closing the small gap that appears between paths when drawing a rounded View with a
    * border.