Remove the system menu display settings row

ash/common/system/tray/system_tray.cc

Index: ash/common/system/tray/system_tray.cc
diff --git a/ash/common/system/tray/system_tray.cc b/ash/common/system/tray/system_tray.cc
index 979e3a197bf51a66dbd25c7795bd57f0adfe2872..b183d77053878950b884ce0271e9c39726f70b41 100644
--- a/ash/common/system/tray/system_tray.cc
+++ b/ash/common/system/tray/system_tray.cc
@@ -197,10 +197,6 @@ void SystemTray::CreateItems(SystemTrayDelegate* delegate) {
   AddTrayItem(tray_cast_);
   // TODO(jamescook): Remove this when mus has support for display management

[James Cook, 2016/08/05 17:00:24]

Delete this comment.

[yiyix, 2016/08/13 05:28:50]

Done.

   // and we have a DisplayManager equivalent. See http://crbug.com/548429
-  std::unique_ptr<SystemTrayItem> tray_display =
-      delegate->CreateDisplayTrayItem(this);
-  if (tray_display)
-    AddTrayItem(tray_display.release());
   screen_capture_tray_item_ = new ScreenCaptureTrayItem(this);
   AddTrayItem(screen_capture_tray_item_);
   screen_share_tray_item_ = new ScreenShareTrayItem(this);