Remove flag disabled_view_preallocation_android

Summary:
changelog: [internal]
unused flag

Reviewed By: mdvacca

Differential Revision: D40346707

fbshipit-source-id: dca8996f81a7675535e340e659eac01c4103f25f

Author: sammy-SC

ReactAndroid/src/main/jni/react/fabric/FabricMountingManager.cpp

@@ -45,8 +45,6 @@ FabricMountingManager::FabricMountingManager(
       cppComponentRegistry_(cppComponentRegistry),
       enableEarlyEventEmitterUpdate_(
           config->getBool("react_fabric:enable_early_event_emitter_update")),
-      disablePreallocateViews_(
-          config->getBool("react_fabric:disabled_view_preallocation_android")),
       disableRevisionCheckForPreallocation_(config->getBool(
           "react_fabric:disable_revision_check_for_preallocation")),
       useOverflowInset_(getFeatureFlagValue("useOverflowInset")) {

ReactAndroid/src/main/jni/react/fabric/FabricMountingManager.h

@@ -73,7 +73,6 @@ class FabricMountingManager final {
   std::shared_ptr<const CppComponentRegistry> cppComponentRegistry_;
 
   bool const enableEarlyEventEmitterUpdate_{false};
-  bool const disablePreallocateViews_{false};
   bool const disableRevisionCheckForPreallocation_{false};
   bool const useOverflowInset_{false};