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

ios/web_view/internal/translate/web_view_translate_ranker_factory.cc

-// 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.
-
-#include "ios/web_view/internal/translate/web_view_translate_ranker_factory.h"
-
-#include "base/memory/ptr_util.h"
-#include "base/memory/singleton.h"
-#include "components/keyed_service/core/keyed_service.h"
-#include "components/keyed_service/ios/browser_state_dependency_manager.h"
-#include "components/translate/core/browser/translate_ranker_impl.h"
-#include "ios/web_view/internal/pref_names.h"
-#include "ios/web_view/internal/web_view_browser_state.h"
-
-namespace ios_web_view {
-
-// static
-WebViewTranslateRankerFactory* WebViewTranslateRankerFactory::GetInstance() {
-  return base::Singleton<WebViewTranslateRankerFactory>::get();
-}
-
-// static
-translate::TranslateRanker* WebViewTranslateRankerFactory::GetForBrowserState(
-    WebViewBrowserState* state) {
-  return static_cast<translate::TranslateRanker*>(
-      GetInstance()->GetServiceForBrowserState(state, true));
-}
-
-WebViewTranslateRankerFactory::WebViewTranslateRankerFactory()
-    : BrowserStateKeyedServiceFactory(
-          "TranslateRankerService",
-          BrowserStateDependencyManager::GetInstance()) {}
-
-WebViewTranslateRankerFactory::~WebViewTranslateRankerFactory() {}
-
-std::unique_ptr<KeyedService>
-WebViewTranslateRankerFactory::BuildServiceInstanceFor(
-    web::BrowserState* context) const {
-  WebViewBrowserState* web_view_browser_state =
-      WebViewBrowserState::FromBrowserState(context);
-  return base::MakeUnique<translate::TranslateRankerImpl>(
-      translate::TranslateRankerImpl::GetModelPath(
-          web_view_browser_state->GetStatePath()),
-      translate::TranslateRankerImpl::GetModelURL());
-}
-
-}  // namespace ios_web_view