Remove the system menu display settings row

ash/test/test_system_tray_delegate.h

Index: ash/test/test_system_tray_delegate.h
diff --git a/ash/test/test_system_tray_delegate.h b/ash/test/test_system_tray_delegate.h
index 8371845bebf158c51fc599e69f89228ae1a71dc0..567f796d4ffcd4d8a7ca559d0d6f82410c3e4d4d 100644
--- a/ash/test/test_system_tray_delegate.h
+++ b/ash/test/test_system_tray_delegate.h
@@ -62,8 +62,6 @@ class TestSystemTrayDelegate : public DefaultSystemTrayDelegate {
   bool GetSessionStartTime(base::TimeTicks* session_start_time) override;
   bool GetSessionLengthLimit(base::TimeDelta* session_length_limit) override;
   void SignOut() override;
-  std::unique_ptr<SystemTrayItem> CreateDisplayTrayItem(
-      SystemTray* tray) override;
   std::unique_ptr<SystemTrayItem> CreateRotationLockTrayItem(
       SystemTray* tray) override;
   void GetCurrentIME(IMEInfo* info) override;