Delete deprecated synced notifications code

chrome/browser/extensions/api/synced_notifications_private/synced_notifications_private_api.h

-// 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.
-
-#ifndef CHROME_BROWSER_EXTENSIONS_API_SYNCED_NOTIFICATIONS_PRIVATE_SYNCED_NOTIFICATIONS_PRIVATE_API_H_
-#define CHROME_BROWSER_EXTENSIONS_API_SYNCED_NOTIFICATIONS_PRIVATE_SYNCED_NOTIFICATIONS_PRIVATE_API_H_
-
-#include "chrome/browser/extensions/chrome_extension_function.h"
-#include "chrome/common/extensions/api/synced_notifications_private.h"
-
-namespace extensions {
-namespace api {
-
-class SyncedNotificationsPrivateGetInitialDataFunction
-    : public UIThreadExtensionFunction {
- public:
-  SyncedNotificationsPrivateGetInitialDataFunction();
-  DECLARE_EXTENSION_FUNCTION("syncedNotificationsPrivate.getInitialData",
-                             SYNCEDNOTIFICATIONSPRIVATE_GETINITIALDATA);
-
- protected:
-  ~SyncedNotificationsPrivateGetInitialDataFunction() override;
-  ResponseAction Run() override;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(SyncedNotificationsPrivateGetInitialDataFunction);
-};
-
-class SyncedNotificationsPrivateUpdateNotificationFunction
-    : public UIThreadExtensionFunction {
- public:
-  SyncedNotificationsPrivateUpdateNotificationFunction();
-  DECLARE_EXTENSION_FUNCTION("syncedNotificationsPrivate.updateNotification",
-                             SYNCEDNOTIFICATIONSPRIVATE_UPDATENOTIFICATION);
-
- protected:
-  ~SyncedNotificationsPrivateUpdateNotificationFunction() override;
-  ResponseAction Run() override;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(
-      SyncedNotificationsPrivateUpdateNotificationFunction);
-};
-
-class SyncedNotificationsPrivateSetRenderContextFunction
-    : public UIThreadExtensionFunction {
- public:
-  SyncedNotificationsPrivateSetRenderContextFunction();
-  DECLARE_EXTENSION_FUNCTION("syncedNotificationsPrivate.setRenderContext",
-                             SYNCEDNOTIFICATIONSPRIVATE_SETRENDERCONTEXT);
-
- protected:
-  ~SyncedNotificationsPrivateSetRenderContextFunction() override;
-  ResponseAction Run() override;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(SyncedNotificationsPrivateSetRenderContextFunction);
-};
-
-}  // namespace api
-}  // namespace extensions
-
-#endif  // CHROME_BROWSER_EXTENSIONS_API_SYNCED_NOTIFICATIONS_PRIVATE_SYNCED_NOTIFICATIONS_PRIVATE_API_H_