Remove the "Settings" packaged app

ash/shell/app_list.cc

 // 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.
 
 #include <memory>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "ash/common/session/session_state_delegate.h"
@@ skipping 295 matching lines @@
 
   void Dismiss() override {
     DCHECK(Shell::HasInstance());
     Shell::GetInstance()->DismissAppList();
   }
 
   void ViewClosing() override {
     // Nothing needs to be done.
   }
 
-  void OpenSettings() override {
-    // Nothing needs to be done.
-  }
-
   void OpenHelp() override {
     // Nothing needs to be done.
   }
 
   void OpenFeedback() override {
     // Nothing needs to be done.
   }
 
   void StartSpeechRecognition() override { NOTIMPLEMENTED(); }
   void StopSpeechRecognition() override { NOTIMPLEMENTED(); }
@@ skipping 25 matching lines @@
 };
 
 }  // namespace
 
 app_list::AppListViewDelegate* CreateAppListViewDelegate() {
   return new ExampleAppListViewDelegate;
 }
 
 }  // namespace shell
 }  // namespace ash