Remove tests for deprecated Options UI

chrome/browser/ui/webui/options/chromeos/date_time_options_browsertest.js

-// Copyright 2014 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.
-
-GEN_INCLUDE(['../options_browsertest_base.js']);
-
-GEN('#if defined(OS_CHROMEOS)');
-
-/**
- * DateTimeOptionsWebUITest tests the date and time section of the options page.
- * @constructor
- * @extends {testing.Test}
- */
-function DateTimeOptionsWebUITest() {}
-
-DateTimeOptionsWebUITest.prototype = {
-  __proto__: OptionsBrowsertestBase.prototype,
-
-  /**
-   * Browse to date/time options.
-   * @override
-   */
-  browsePreload: 'chrome://settings-frame/search#date',
-};
-
-TEST_F('DateTimeOptionsWebUITest', 'testShowSetTimeButton', function() {
-  assertEquals(this.browsePreload, document.location.href);
-
-  // Show button.
-  BrowserOptions.setCanSetTime(true);
-  expectFalse($('set-time').hidden);
-
-  // Hide button.
-  BrowserOptions.setCanSetTime(false);
-  expectTrue($('set-time').hidden);
-});
-
-GEN('#endif');