UIKit tvOS 11.0 Beta 2 to Beta 3 API Differences

UIFocusSystem.h

Removed -[UIFocusSystem requestFocusUpdateToEnvironment:]

Removed -[UIFocusSystem updateFocusIfNeeded]

UITextDropProposal.h

Added UITextDropPerformer

UIViewController.h

Removed UIViewController.safeAreaLayoutGuide

Removed -[UIViewController childViewControllerForScreenEdgesDeferringSystemGestures]

Removed -[UIViewController preferredScreenEdgesDeferringSystemGestures]

Removed -[UIViewController setNeedsUpdateOfScreenEdgesDeferringSystemGestures]