Use unique id for both root and hosting views

Summary: Same as D19600721, but supports hosting views too.

Reviewed By: cuva

Differential Revision: D19949935

fbshipit-source-id: 4490b03aff9f6d00003cf59468081cc3a4fef598

iOS/Plugins/FlipperKitLayoutPlugin/FlipperKitLayoutComponentKitSupport/SKComponentLayoutWrapper.mm

@@ -47,10 +47,6 @@ static CKFlexboxComponentChild findFlexboxLayoutParams(
 
 @implementation SKComponentLayoutWrapper
 
-+ (instancetype)newFromRoot:(id<CKInspectableView>)root {
-  return [self newFromRoot:root parentKey:@""];
-}
-
 + (instancetype)newFromRoot:(id<CKInspectableView>)root
                   parentKey:(NSString*)parentKey {
   const CKComponentLayout layout = [root mountedLayout];