Remove the system menu display settings row

ash/common/system/tray/system_tray_delegate.h

 // Copyright (c) 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_TRAY_SYSTEM_TRAY_DELEGATE_H_
 #define ASH_COMMON_SYSTEM_TRAY_SYSTEM_TRAY_DELEGATE_H_
 
 #include <memory>
 #include <string>
 #include <vector>
@@ skipping 304 matching lines @@
   virtual void RemoveShutdownPolicyObserver(ShutdownPolicyObserver* observer);
 
   // Determines whether the device is automatically rebooted when shut down as
   // specified by the device policy |DeviceRebootOnShutdown|. This function
   // asynchronously calls |callback| once a trusted policy becomes available.
   virtual void ShouldRebootOnShutdown(const RebootOnShutdownCallback& callback);
 
   // Returns VPNDelegate. May return nullptr.
   virtual VPNDelegate* GetVPNDelegate() const;
 
-  // Creates a system tray item for display settings.
-  // TODO(jamescook): Remove this when mus has support for display management
-  // and we have a DisplayManager equivalent. See http://crbug.com/548429
-  virtual std::unique_ptr<SystemTrayItem> CreateDisplayTrayItem(
-      SystemTray* tray);
-
   // Creates a system tray item for display rotation lock.
   // TODO(jamescook): Remove this when mus has support for display management
   // and we have a DisplayManager equivalent. See http://crbug.com/548429
   virtual std::unique_ptr<SystemTrayItem> CreateRotationLockTrayItem(
       SystemTray* tray);
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_SYSTEM_TRAY_SYSTEM_TRAY_DELEGATE_H_