Fabric: Removing leftovers from previous implementation of view preallocation infra

Summary: Now it's implementled differently (see -[RCTComponentViewRegistry preallocateViewComponents]), so this code is not being used.

Reviewed By: mdvacca

Differential Revision: D15242045

fbshipit-source-id: c02eceb978cf1eae778f84a73456e7156ccf503b

React/Fabric/Mounting/RCTMountingManager.h

@@ -32,13 +32,6 @@ NS_ASSUME_NONNULL_BEGIN
  */
 - (void)scheduleTransaction:(facebook::react::MountingCoordinator::Shared const &)mountingCoordinator;
 
-/**
- * Suggests preliminary creation of a component view of given type.
- * The receiver is free to ignore the request.
- * Can be called from any thread.
- */
-- (void)optimisticallyCreateComponentViewWithComponentHandle:(facebook::react::ComponentHandle)componentHandle;
-
 - (void)synchronouslyUpdateViewOnUIThread:(ReactTag)reactTag
                              changedProps:(NSDictionary *)props
                       componentDescriptor:(const facebook::react::ComponentDescriptor &)componentDescriptor;

React/Fabric/Mounting/RCTMountingManager.mm

@@ -260,16 +260,4 @@ static void RNPerformMountInstructions(ShadowViewMutationList const &mutations,
   [componentView updateProps:newProps oldProps:oldProps];
 }
 
-- (void)optimisticallyCreateComponentViewWithComponentHandle:(ComponentHandle)componentHandle
-{
-  if (RCTIsMainQueue()) {
-    // There is no reason to allocate views ahead of time on the main thread.
-    return;
-  }
-
-  RCTExecuteOnMainQueue(^{
-    [self->_componentViewRegistry optimisticallyCreateComponentViewWithComponentHandle:componentHandle];
-  });
-}
-
 @end

React/Fabric/RCTScheduler.h

@@ -27,8 +27,6 @@ NS_ASSUME_NONNULL_BEGIN
 
 - (void)schedulerDidFinishTransaction:(facebook::react::MountingCoordinator::Shared const &)mountingCoordinator;
 
-- (void)schedulerOptimisticallyCreateComponentViewWithComponentHandle:(facebook::react::ComponentHandle)componentHandle;
-
 @end
 
 /**

React/Fabric/RCTSurfacePresenter.mm

@@ -311,11 +311,6 @@ using namespace facebook::react;
   [_mountingManager scheduleTransaction:mountingCoordinator];
 }
 
-- (void)schedulerOptimisticallyCreateComponentViewWithComponentHandle:(ComponentHandle)componentHandle
-{
-  [_mountingManager optimisticallyCreateComponentViewWithComponentHandle:componentHandle];
-}
-
 - (void)addObserver:(id<RCTSurfacePresenterObserver>)observer
 {
   std::unique_lock<better::shared_mutex> lock(_observerListMutex);