[Clean Skeleton] Migrate code to clean/

ios/chrome/app/steps/tab_grid_coordinator+application_step.h

Index: ios/chrome/app/steps/tab_grid_coordinator+application_step.h
diff --git a/ios/chrome/app/steps/tab_grid_coordinator+application_step.h b/ios/chrome/app/steps/tab_grid_coordinator+application_step.h
deleted file mode 100644
index e7fdf90149101e32f7fca8a1f520b8bb295d150f..0000000000000000000000000000000000000000
--- a/ios/chrome/app/steps/tab_grid_coordinator+application_step.h
+++ /dev/null
@@ -1,27 +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_APP_STEPS_TAB_GRID_COORDINATOR_APPLICATION_STEP_H_
-#define IOS_CHROME_APP_STEPS_TAB_GRID_COORDINATOR_APPLICATION_STEP_H_
-
-#import <UIKit/UIKit.h>
-
-#include "ios/chrome/app/application_step.h"
-#import "ios/chrome/browser/ui/tab_grid/tab_grid_coordinator.h"
-
-// Category on TabGridCoordinator to allow it to act as an application step
-// and control the root UI for the application when is starts.
-// Creates the main window and makes it key, but doesn't make it visible yet.
-//  Pre:  Application phase is APPLICATION_FOREGROUNDED and the main window is
-//        key.
-//  Post: Application phase is (still) APPLICATION_FOREGROUNDED, the main window
-//        is visible and has a root view controller set.
-@interface TabGridCoordinator (ApplicationStep)<ApplicationStep>
-@end
-
-#endif  // IOS_CHROME_APP_STEPS_TAB_GRID_COORDINATOR_APPLICATION_STEP_H_