Remove ash tray utility functions that are no-ops in MD.

ash/common/system/ime/tray_ime_chromeos.h

 // Copyright 2012 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 ASH_COMMON_SYSTEM_IME_TRAY_IME_CHROMEOS_H_
 #define ASH_COMMON_SYSTEM_IME_TRAY_IME_CHROMEOS_H_
 
 #include <stddef.h>
 
 #include "ash/common/system/accessibility_observer.h"
@@ skipping 41 matching lines @@
   // Returns the appropriate label for the detailed view.
   base::string16 GetDefaultViewLabel(bool show_ime_label);
 
   // Overridden from SystemTrayItem.
   views::View* CreateTrayView(LoginStatus status) override;
   views::View* CreateDefaultView(LoginStatus status) override;
   views::View* CreateDetailedView(LoginStatus status) override;
   void DestroyTrayView() override;
   void DestroyDefaultView() override;
   void DestroyDetailedView() override;
-  void UpdateAfterLoginStatusChange(LoginStatus status) override;
-  void UpdateAfterShelfAlignmentChange(ShelfAlignment alignment) override;
 
   // Overridden from IMEObserver.
   void OnIMERefresh() override;
   void OnIMEMenuActivationChanged(bool is_active) override;
 
   // Returns true input methods are managed by policy.
   bool IsIMEManaged();
 
   // Whether the default view should be shown.
   bool ShouldDefaultViewBeVisible();
@@ skipping 19 matching lines @@
 
   // Whether the IME label and tray items should be visible.
   bool is_visible_;
 
   DISALLOW_COPY_AND_ASSIGN(TrayIME);
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_SYSTEM_IME_TRAY_IME_CHROMEOS_H_