Remove the "Settings" packaged app

ui/app_list/app_list_view_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 UI_APP_LIST_APP_LIST_VIEW_DELEGATE_H_
 #define UI_APP_LIST_APP_LIST_VIEW_DELEGATE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 99 matching lines @@
   // Invoked when the app list UI is created.
   virtual void ViewInitialized() = 0;
 
   // Invoked to dismiss app list. This may leave the view open but hidden from
   // the user.
   virtual void Dismiss() = 0;
 
   // Invoked when the app list is closing.
   virtual void ViewClosing() = 0;
 
-  // Open the settings UI.
-  virtual void OpenSettings() = 0;
-
   // Open the help UI.
   virtual void OpenHelp() = 0;
 
   // Open the feedback UI.
   virtual void OpenFeedback() = 0;
 
   // Invoked to toggle the status of speech recognition.
   virtual void StartSpeechRecognition() = 0;
   virtual void StopSpeechRecognition() = 0;
 
@@ skipping 42 matching lines @@
   virtual base::string16 GetLearnMoreText() const;
   virtual base::string16 GetLearnMoreLink() const;
   virtual gfx::ImageSkia* GetAppsIcon() const;
   virtual void OpenLearnMoreLink();
 #endif
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_APP_LIST_VIEW_DELEGATE_H_