Remove tests for deprecated Options UI

chrome/browser/ui/webui/options/search_engine_manager_browsertest.js

-// 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.
-
-/**
- * TestFixture for search engine manager WebUI testing.
- * @extends {testing.Test}
- * @constructor
- */
-function SearchEngineManagerWebUITest() {}
-
-SearchEngineManagerWebUITest.prototype = {
-  __proto__: testing.Test.prototype,
-
-  /**
-   * Browse to the search engine manager.
-   */
-  browsePreload: 'chrome://settings-frame/searchEngines',
-};
-
-// Disabled due to flaky timeouts; see crbug.com/205693 .
-// Test opening the search engine manager has correct location.
-TEST_F('SearchEngineManagerWebUITest', 'DISABLED_testOpenSearchEngineManager',
-       function() {
-         assertEquals(this.browsePreload, document.location.href);
-       });