Revert "[translate] Add translate ranker model loader."

ios/web_view/internal/translate/web_view_translate_ranker_factory.h

-// Copyright 2016 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 IOS_WEB_VIEW_INTERNAL_TRANSLATE_WEB_VIEW_TRANSLATE_RANKER_FACTORY_H_
-#define IOS_WEB_VIEW_INTERNAL_TRANSLATE_WEB_VIEW_TRANSLATE_RANKER_FACTORY_H_
-
-#include <memory>
-#include "base/macros.h"
-#include "components/keyed_service/ios/browser_state_keyed_service_factory.h"
-
-namespace base {
-template <typename T>
-struct DefaultSingletonTraits;
-}  // namespace base
-
-namespace translate {
-class TranslateRanker;
-}
-
-namespace ios_web_view {
-
-class WebViewBrowserState;
-
-// TranslateRankerFactory is a way to associate a
-// TranslateRanker instance to a BrowserState.
-class WebViewTranslateRankerFactory : public BrowserStateKeyedServiceFactory {
- public:
-  static translate::TranslateRanker* GetForBrowserState(
-      WebViewBrowserState* browser_state);
-  static WebViewTranslateRankerFactory* GetInstance();
-
- private:
-  friend struct base::DefaultSingletonTraits<WebViewTranslateRankerFactory>;
-
-  WebViewTranslateRankerFactory();
-  ~WebViewTranslateRankerFactory() override;
-
-  // BrowserStateKeyedServiceFactory implementation.
-  std::unique_ptr<KeyedService> BuildServiceInstanceFor(
-      web::BrowserState* context) const override;
-
-  DISALLOW_COPY_AND_ASSIGN(WebViewTranslateRankerFactory);
-};
-
-}  // namespace ios_web_view
-
-#endif  // IOS_WEB_VIEW_INTERNAL_TRANSLATE_WEB_VIEW_TRANSLATE_RANKER_FACTORY_H_