Remove tests for deprecated Options UI

chrome/browser/ui/webui/options/multilanguage_options_browsertest.h

-// Copyright 2015 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.
-
-#ifndef CHROME_BROWSER_UI_WEBUI_OPTIONS_MULTILANGUAGE_OPTIONS_BROWSERTEST_H_
-#define CHROME_BROWSER_UI_WEBUI_OPTIONS_MULTILANGUAGE_OPTIONS_BROWSERTEST_H_
-
-#include "base/macros.h"
-#include "chrome/test/base/web_ui_browser_test.h"
-
-// This is a helper class used by multilanguage_options_webui_browsertest.js
-// to flip the enable-multilingual-spellchecker command line switch and set
-// the AcceptLanguages and SpellcheckDictionaries preferences.
-class MultilanguageOptionsBrowserTest : public WebUIBrowserTest {
- public:
-  MultilanguageOptionsBrowserTest();
-  ~MultilanguageOptionsBrowserTest() override;
-  // Set the kSpellCheckDictionaries preference to an empty list value.
-  void ClearSpellcheckDictionaries();
-
- private:
-  // WebUIBrowserTest implementation.
-  void SetUpOnMainThread() override;
-  void SetDictionariesPref(const base::ListValue& value);
-
-  DISALLOW_COPY_AND_ASSIGN(MultilanguageOptionsBrowserTest);
-};
-
-#endif  // CHROME_BROWSER_UI_WEBUI_OPTIONS_MULTILANGUAGE_OPTIONS_BROWSERTEST_H_