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

ios/chrome/browser/translate/translate_ranker_factory.cc

-// 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.
-
-#include "ios/chrome/browser/translate/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/chrome/browser/browser_state/browser_state_otr_helper.h"
-#include "ios/chrome/browser/browser_state/chrome_browser_state.h"
-
-namespace translate {
-
-// static
-TranslateRankerFactory* TranslateRankerFactory::GetInstance() {
-  return base::Singleton<TranslateRankerFactory>::get();
-}
-
-// static
-translate::TranslateRanker* TranslateRankerFactory::GetForBrowserState(
-    ios::ChromeBrowserState* state) {
-  return static_cast<TranslateRanker*>(
-      GetInstance()->GetServiceForBrowserState(state, true));
-}
-
-TranslateRankerFactory::TranslateRankerFactory()
-    : BrowserStateKeyedServiceFactory(
-          "TranslateRankerService",
-          BrowserStateDependencyManager::GetInstance()) {}
-
-TranslateRankerFactory::~TranslateRankerFactory() {}
-
-std::unique_ptr<KeyedService> TranslateRankerFactory::BuildServiceInstanceFor(
-    web::BrowserState* context) const {
-  ios::ChromeBrowserState* browser_state =
-      ios::ChromeBrowserState::FromBrowserState(context);
-  return base::MakeUnique<TranslateRankerImpl>(
-      TranslateRankerImpl::GetModelPath(browser_state->GetStatePath()),
-      TranslateRankerImpl::GetModelURL());
-}
-
-web::BrowserState* TranslateRankerFactory::GetBrowserStateToUse(
-    web::BrowserState* context) const {
-  return GetBrowserStateRedirectedInIncognito(context);
-}
-
-}  // namespace translate