Delete deprecated synced notifications code

chrome/browser/notifications/sync_notifier/chrome_notifier_service_factory.cc

-// Copyright (c) 2013 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 "chrome/browser/notifications/sync_notifier/chrome_notifier_service_factory.h"
-
-#include "chrome/browser/notifications/sync_notifier/chrome_notifier_service.h"
-#include "components/keyed_service/content/browser_context_dependency_manager.h"
-
-namespace notifier {
-
-// static
-ChromeNotifierService* ChromeNotifierServiceFactory::GetForProfile(
-    Profile* profile, Profile::ServiceAccessType service_access_type) {
-  return static_cast<ChromeNotifierService*>(
-      GetInstance()->GetServiceForBrowserContext(profile, true));
-}
-
-// static
-ChromeNotifierServiceFactory* ChromeNotifierServiceFactory::GetInstance() {
-  return Singleton<ChromeNotifierServiceFactory>::get();
-}
-
-
-ChromeNotifierServiceFactory::ChromeNotifierServiceFactory()
-    : BrowserContextKeyedServiceFactory(
-          "ChromeNotifierService",
-          BrowserContextDependencyManager::GetInstance()) {
-}
-
-ChromeNotifierServiceFactory::~ChromeNotifierServiceFactory() {
-}
-
-KeyedService* ChromeNotifierServiceFactory::BuildServiceInstanceFor(
-    content::BrowserContext* profile) const {
-  ChromeNotifierService* chrome_notifier_service =
-      new ChromeNotifierService(static_cast<Profile*>(profile));
-  return chrome_notifier_service;
-}
-
-}  // namespace notifier