[Clean Skeleton] Migrate code to clean/

ios/chrome/browser/ui/ui_types.h

Index: ios/chrome/browser/ui/ui_types.h
diff --git a/ios/chrome/browser/ui/ui_types.h b/ios/chrome/browser/ui/ui_types.h
deleted file mode 100644
index caeb0c0dff0076e317643372cdd106ac35361764..0000000000000000000000000000000000000000
--- a/ios/chrome/browser/ui/ui_types.h
+++ /dev/null
@@ -1,15 +0,0 @@
-// Copyright 2016 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.
-
-// ======                        New Architecture                         =====
-// =         This code is only used in the new iOS Chrome architecture.       =
-// ============================================================================
-
-#ifndef IOS_CHROME_BROWSER_UI_UI_TYPES_H_
-#define IOS_CHROME_BROWSER_UI_UI_TYPES_H_
-
-// Utility typedefs shared across UI components.
-typedef NSArray<NSLayoutConstraint*> Constraints;
-
-#endif  // IOS_CHROME_BROWSER_UI_UI_TYPES_H_