Remove old Chromoting iOS client

remoting/ios/bridge/client_proxy_delegate_wrapper.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 REMOTING_IOS_BRIDGE_HOST_PROXY_DELEGATE_WRAPPER_H_
-#define REMOTING_IOS_BRIDGE_HOST_PROXY_DELEGATE_WRAPPER_H_
-
-#import <Foundation/Foundation.h>
-#import <UIKit/UIKit.h>
-
-#include <vector>
-
-#include "third_party/webrtc/modules/desktop_capture/desktop_geometry.h"
-
-#import "remoting/ios/bridge/client_proxy_delegate.h"
-
-// Wraps ClientProxyDelegate in a class so C++ can accept a strongly typed
-// pointer.  C++ does not understand the id<> convention of passing around a
-// OBJ_C @protocol pointer.  So the @protocol is wrapped and the class is passed
-// around.  After accepting an instance of ClientProxyDelegateWrapper, the
-// @protocol can be referenced as type (id), which is similar to a (void*),
-
-@interface ClientProxyDelegateWrapper : NSObject
-
-@property(nonatomic, retain, readonly) id<ClientProxyDelegate> delegate;
-
-- (id)init __unavailable;
-
-+ (id)wrapDelegate:(id<ClientProxyDelegate>)delegate;
-
-@end
-
-#endif  // REMOTING_IOS_BRIDGE_HOST_PROXY_DELEGATE_WRAPPER_H_