cros: Remove unused method

chrome/browser/ui/webui/chromeos/login/supervised_user_creation_screen_handler.cc

 // Copyright 2014 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/supervised_user_creation_screen_handler.h"
 
 #include <utility>
 
 #include "base/memory/ptr_util.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 201 matching lines @@
               &SupervisedUserCreationScreenHandler::HandleTakePhoto);
   AddCallback("supervisedUserDiscardPhoto",
               &SupervisedUserCreationScreenHandler::HandleDiscardPhoto);
   AddCallback("supervisedUserSelectImage",
               &SupervisedUserCreationScreenHandler::HandleSelectImage);
   AddCallback("currentSupervisedUserPage",
               &SupervisedUserCreationScreenHandler::
                   HandleCurrentSupervisedUserPage);
 }
 
-void SupervisedUserCreationScreenHandler::PrepareToShow() {}
-
 void SupervisedUserCreationScreenHandler::Show() {
   std::unique_ptr<base::DictionaryValue> data(new base::DictionaryValue());
   std::unique_ptr<base::ListValue> users_list(new base::ListValue());
   const user_manager::UserList& users =
       ChromeUserManager::Get()->GetUsersAllowedForSupervisedUsersCreation();
   std::string owner;
   chromeos::CrosSettings::Get()->GetString(chromeos::kDeviceOwner, &owner);
 
   for (user_manager::UserList::const_iterator it = users.begin();
        it != users.end();
@@ skipping 236 matching lines @@
 void SupervisedUserCreationScreenHandler::SetCameraPresent(bool present) {
   CallJS("setCameraPresent", present);
 }
 
 void SupervisedUserCreationScreenHandler::ShowExistingSupervisedUsers(
     const base::ListValue* users) {
   CallJS("setExistingSupervisedUsers", *users);
 }
 
 }  // namespace chromeos