Remove the "Settings" packaged app

chrome/browser/ui/app_list/app_list_view_delegate.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 "chrome/browser/ui/app_list/app_list_view_delegate.h"
 
 #include <stddef.h>
 
 #include <vector>
 
@@ skipping 549 matching lines @@
         // the launcher to open.
         // TODO(amistry): This only works on ChromeOS since Chrome hides the
         // launcher instead of destroying it. Make this work on Chrome.
         if (hotword_service->IsAlwaysOnEnabled())
           hotword_service->RequestHotwordSession(nullptr);
       }
     }
   }
 }
 
-void AppListViewDelegate::OpenSettings() {
-  const extensions::Extension* extension =
-      extensions::ExtensionRegistry::Get(profile_)->GetExtensionById(
-          extension_misc::kSettingsAppId,
-          extensions::ExtensionRegistry::EVERYTHING);
-  DCHECK(extension);
-  controller_->ActivateApp(profile_,
-                           extension,
-                           AppListControllerDelegate::LAUNCH_FROM_UNKNOWN,
-                           0);
-}
-
 void AppListViewDelegate::OpenHelp() {
   chrome::ScopedTabbedBrowserDisplayer displayer(profile_);
   content::OpenURLParams params(GURL(chrome::kAppLauncherHelpURL),
                                 content::Referrer(),
                                 NEW_FOREGROUND_TAB,
                                 ui::PAGE_TRANSITION_LINK,
                                 false);
   displayer.browser()->OpenURL(params);
 }
 
@@ skipping 257 matching lines @@
   FOR_EACH_OBSERVER(app_list::AppListViewDelegateObserver, observers_,
                     OnShutdown());
 
   SetProfile(nullptr);  // Ensures launcher page web contents are torn down.
 
   // SigninManagerFactory is not a leaky singleton (unlike this class), and
   // its destructor will check that it has no remaining observers.
   scoped_observer_.RemoveAll();
   SigninManagerFactory::GetInstance()->RemoveObserver(this);
 }