[ios clean] Moves animator and presenters under transitions

ios/clean/chrome/browser/ui/animators/zoom_transition_controller.h

Index: ios/clean/chrome/browser/ui/animators/zoom_transition_controller.h
diff --git a/ios/clean/chrome/browser/ui/animators/zoom_transition_controller.h b/ios/clean/chrome/browser/ui/animators/zoom_transition_controller.h
deleted file mode 100644
index fffd83e820db32e06fd52fd914d434afd0e94fd2..0000000000000000000000000000000000000000
--- a/ios/clean/chrome/browser/ui/animators/zoom_transition_controller.h
+++ /dev/null
@@ -1,22 +0,0 @@
-// Copyright 2017 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef IOS_CLEAN_CHROME_BROWSER_UI_ANIMATORS_ZOOM_TRANSITION_CONTROLLER_H_
-#define IOS_CLEAN_CHROME_BROWSER_UI_ANIMATORS_ZOOM_TRANSITION_CONTROLLER_H_
-
-#import <UIKit/UIKit.h>
-
-// Transition delegate object that conforms to the
-// UIViewControllerTransitioningDelegate protocol and provides the VC
-// with a ZoomAnimator as animator for transitions.
-@interface ZoomTransitionController
-    : NSObject<UIViewControllerTransitioningDelegate>
-
-// Optional object that can be passed into the animator to identify a specific
-// location. For example, an object in a table or collection view might have
-// its index path passed in so the delegate can map that to a screen location.
-@property(nonatomic, copy) NSObject* presentationKey;
-@end
-
-#endif  // IOS_CLEAN_CHROME_BROWSER_UI_ANIMATORS_ZOOM_TRANSITION_CONTROLLER_H_