Cleanup: remove unused internet and system pages for chrome os options.

chrome/browser/chromeos/options/system_page_view.h

-// Copyright (c) 2006-2008 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.
-
-#ifndef CHROME_BROWSER_CHROMEOS_OPTIONS_SYSTEM_PAGE_VIEW_H_
-#define CHROME_BROWSER_CHROMEOS_OPTIONS_SYSTEM_PAGE_VIEW_H_
-#pragma once
-
-#include "chrome/browser/chromeos/options/settings_page_view.h"
-
-namespace chromeos {
-
-// System settings page for Chrome OS
-class SystemPageView : public SettingsPageView {
- public:
-  explicit SystemPageView(Profile* profile) : SettingsPageView(profile) {}
-  virtual ~SystemPageView() {}
-
- protected:
-  // SettingsPageView implementation:
-  virtual void InitControlLayout();
-
-  DISALLOW_COPY_AND_ASSIGN(SystemPageView);
-};
-
-}  // namespace chromeos
-
-#endif  // CHROME_BROWSER_CHROMEOS_OPTIONS_SYSTEM_PAGE_VIEW_H_