get rid of old options pages

chrome/browser/resources/options/clear_browser_data_overlay.css

-/*
-Copyright (c) 2011 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.
-*/
-
-#clearBrowserDataOverlay {
-  min-width: 500px;
-}
-
-#clearBrowserDataOverlay > .content-area label {
-  margin: 5px 0;
-}
-
-#clear-data-checkboxes {
-  -webkit-padding-start: 8px;
-  margin: 5px 0;
-}
-
-#cbdThrobber {
-  margin: 4px 10px;
-  vertical-align: middle;
-  visibility: hidden;
-}