Remove the "Settings" packaged app

chrome/browser/resources/options/options_settings_app.css

-/* Copyright 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. */
-
-/* Don't use the large margin used for the navigation bar. Settings App uses a
- * 20px margin for headings + 18px for sections.
- */
-html.settings-app body.uber-frame {
-  -webkit-margin-start: 38px;
-}
-
-/* There is a tweak in uber_shared.css to improve touch events around the
- * navigation bar (which is not used for the settings app) in reaction to a
- * webkit bug (wk95204). We need to reset back to the original style.
- */
-@media(pointer:coarse) {
-  html.settings-app body.uber-frame section {
-    -webkit-padding-start: 18px;
-  }
-  html.settings-app body.uber-frame section > h3 {
-    -webkit-margin-start: -18px;
-  }
-}
-
-html.settings-app body.uber-frame header {
-  left: 20px;
-  min-width: 400px;
-}
-
-html.settings-app #content-settings-page .content-area {
-  -webkit-margin-start: 18px;
-}
-
-/* Settings App is narrower due to no navigation margin, so the roomy language
- * overlay needs to be trimmed down. 25% is taken off the original height and
- * the width is trimmed proportional to (half) the reduction due to the removal
- * of the left margin.
- */
-html.settings-app .language-options-left {
-  height: 300px;
-  width: 228px;
-}
-
-html.settings-app .language-options-right {
-  height: 300px;
-  width: 288px;
-}