Delete unused struct

Summary:
This struct is no longer used.

Changelog: [Internal]

Reviewed By: sammy-SC

Differential Revision: D29312925

fbshipit-source-id: b766014ecb7b6c5dc96d54a94d465e104e292f5f

ReactAndroid/src/main/java/com/facebook/react/fabric/jni/Binding.cpp

@@ -46,14 +46,6 @@ struct JMountItem : public JavaClass<JMountItem> {
       "Lcom/facebook/react/fabric/mounting/mountitems/MountItem;";
 };
 
-struct RemoveDeleteMetadata {
-  Tag tag;
-  Tag parentTag;
-  int index;
-  bool shouldRemove;
-  bool shouldDelete;
-};
-
 } // namespace
 
 CppMountItem CppMountItem::CreateMountItem(ShadowView shadowView) {