cros: Remove unused method

chrome/browser/chromeos/login/screens/terms_of_service_screen.cc

 // Copyright (c) 2013 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/chromeos/login/screens/terms_of_service_screen.h"
 
 #include <string>
 #include <utility>
 
 #include "base/location.h"
@@ skipping 22 matching lines @@
   DCHECK(actor_);
   if (actor_)
     actor_->SetDelegate(this);
 }
 
 TermsOfServiceScreen::~TermsOfServiceScreen() {
   if (actor_)
     actor_->SetDelegate(NULL);
 }
 
-void TermsOfServiceScreen::PrepareToShow() {
-}
-
 void TermsOfServiceScreen::Show() {
   if (!actor_)
     return;
 
   // Set the domain name whose Terms of Service are being shown.
   policy::BrowserPolicyConnectorChromeOS* connector =
       g_browser_process->platform_part()->browser_policy_connector_chromeos();
   actor_->SetDomain(connector->GetEnterpriseDomain());
 
   // Show the screen.
@@ skipping 88 matching lines @@
       !source->GetResponseAsString(&terms_of_service)) {
     actor_->OnLoadError();
   } else {
     // If the Terms of Service were downloaded successfully, show them to the
     // user.
     actor_->OnLoadSuccess(terms_of_service);
   }
 }
 
 }  // namespace chromeos