cros: Remove unused method

chrome/browser/ui/webui/chromeos/login/network_screen_handler.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/webui/chromeos/login/network_screen_handler.h"
 
 #include <stddef.h>
 
 #include <utility>
 
@@ skipping 51 matching lines @@
   DCHECK(core_oobe_actor_);
 }
 
 NetworkScreenHandler::~NetworkScreenHandler() {
   if (model_)
     model_->OnViewDestroyed(this);
 }
 
 // NetworkScreenHandler, NetworkScreenActor implementation: --------------------
 
-void NetworkScreenHandler::PrepareToShow() {
-}
-
 void NetworkScreenHandler::Show() {
   if (!page_is_ready()) {
     show_on_init_ = true;
     return;
   }
 
   PrefService* prefs = g_browser_process->local_state();
   if (prefs->GetBoolean(prefs::kFactoryResetRequested)) {
     if (core_oobe_actor_)
       core_oobe_actor_->ShowDeviceResetScreen();
@@ skipping 201 matching lines @@
     timezone_option->SetString("value", timezone_id);
     timezone_option->SetString("title", timezone_name);
     timezone_option->SetBoolean("selected", timezone_id == current_timezone_id);
     timezone_list->Append(std::move(timezone_option));
   }
 
   return timezone_list.release();
 }
 
 }  // namespace chromeos