cros: Remove unused method

chrome/browser/ui/webui/chromeos/login/reset_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/reset_screen_handler.h"
 
 #include <string>
 
 #include "base/values.h"
 #include "chrome/browser/browser_process.h"
@@ skipping 20 matching lines @@
     : BaseScreenHandler(kJsScreenPath),
       model_(nullptr),
       show_on_init_(false) {
 }
 
 ResetScreenHandler::~ResetScreenHandler() {
   if (model_)
     model_->OnViewDestroyed(this);
 }
 
-void ResetScreenHandler::PrepareToShow() {
-}
-
 void ResetScreenHandler::Show() {
   if (!page_is_ready()) {
     show_on_init_ = true;
     return;
   }
   ShowScreen(OobeScreen::SCREEN_OOBE_RESET);
 }
 
 void ResetScreenHandler::Hide() {
 }
@@ skipping 60 matching lines @@
   model_ = &model;
   BaseScreenHandler::SetBaseScreen(model_);
 }
 
 void ResetScreenHandler::Unbind() {
   model_ = nullptr;
   BaseScreenHandler::SetBaseScreen(nullptr);
 }
 
 }  // namespace chromeos