Remove unused ntp_search.

chrome/browser/resources/ntp_search/most_visited_page.css

-/* Copyright (c) 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. */
-
-.close-button {
-  background: no-repeat;
-  background-color: transparent;
-  /* TODO(estade): this should animate between states. */
-  background-image: -webkit-image-set(
-      url('../../../../ui/resources/default_100_percent/close_bar.png') 1x,
-      url('../../../../ui/resources/default_200_percent/close_bar.png') 2x);
-  border: 0;
-  cursor: default;
-  display: inline-block;
-  height: 16px;
-  padding: 0;
-  width: 16px;
-  z-index: 999;
-}
-
-.close-button:hover,
-.close-button:focus {
-  background-image: -webkit-image-set(
-      url('../../../../ui/resources/default_100_percent/close_bar_hover.png')
-          1x,
-      url('../../../../ui/resources/default_200_percent/close_bar_hover.png')
-          2x);
-}
-
-.close-button:active {
-  background-image: -webkit-image-set(
-      url('../../../../ui/resources/default_100_percent/close_bar_pressed.png')
-          1x,
-      url('../../../../ui/resources/default_200_percent/close_bar_pressed.png')
-          2x);
-}
-
-/* TODO(pedrosimonetti): Organize these rules. */
-.thumbnail .close-button {
-  -webkit-transition: opacity 500ms ease-in-out;
-  opacity: 0;
-  position: absolute;
-  right: 2px;
-  top: 2px;
-}
-
-html[dir=rtl] .thumbnail .close-button {
-  left: 0;
-  right: auto;
-}
-
-.thumbnail:hover .close-button {
-  -webkit-transition-delay: 500ms;
-  opacity: 1;
-}
-
-.thumbnail .close-button:hover {
-  -webkit-transition: none;
-}