Removing RCTUIManager.unsafeFlushUIChangesBeforeBatchEnds experiment

Reviewed By: javache

Differential Revision: D6432476

fbshipit-source-id: fd02b686cf8bc70a4dfcc02d3bbfdf01c611f351

React/Modules/RCTUIManager.h

@@ -149,17 +149,6 @@ RCT_EXTERN NSString *const RCTUIManagerWillUpdateViewsDueToContentSizeMultiplier
  */
 + (UIView *)JSResponder;
 
-/**
- * Normally, UI changes are not applied until the complete batch of method
- * invocations from JavaScript to native has completed.
- *
- * Setting this to YES will flush UI changes sooner, which could potentially
- * result in inconsistent UI updates.
- *
- * The default is NO (recommended).
- */
-@property (atomic, assign) BOOL unsafeFlushUIChangesBeforeBatchEnds;
-
 /**
  * In some cases we might want to trigger layout from native side.
  * React won't be aware of this, so we need to make sure it happens.

React/Modules/RCTUIManager.m

@@ -1092,13 +1092,6 @@ RCT_EXPORT_METHOD(dispatchViewManagerCommand:(nonnull NSNumber *)reactTag
   [method invokeWithBridge:_bridge module:componentData.manager arguments:args];
 }
 
-- (void)partialBatchDidFlush
-{
-  if (self.unsafeFlushUIChangesBeforeBatchEnds) {
-    [self flushUIBlocks];
-  }
-}
-
 - (void)batchDidComplete
 {
   [self _layoutAndMount];

React/Modules/RCTUIManagerObserverCoordinator.h

@@ -40,8 +40,7 @@
 - (void)uiManagerDidPerformLayout:(RCTUIManager *)manager;
 
 /**
- * Called before flushing UI blocks at the end of a batch. Note that this won't
- * get called for partial batches when using `unsafeFlushUIChangesBeforeBatchEnds`.
+ * Called before flushing UI blocks at the end of a batch.
  * This is called from the UIManager queue. Can be used to add UI operations in that batch.
  */
 - (void)uiManagerWillFlushUIBlocks:(RCTUIManager *)manager;