Remove crufty bridge code from old CRD iOS app.

remoting/client/ios/bridge/client_proxy_delegate.h

-// 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.
-
-#ifndef REMOTING_CLIENT_IOS_BRIDGE_HOST_PROXY_DELEGATE_H_
-#define REMOTING_CLIENT_IOS_BRIDGE_HOST_PROXY_DELEGATE_H_
-
-#import <Foundation/Foundation.h>
-#import <UIKit/UIKit.h>
-
-#include <vector>
-
-#include "third_party/webrtc/modules/desktop_capture/desktop_geometry.h"
-
-// Contract to provide for callbacks from the common Chromoting protocol to the
-// UI Application.
-@protocol ClientProxyDelegate<NSObject>
-
-// HOST request for client to input their PIN.
-- (void)requestHostPin:(BOOL)pairingSupported;
-
-// HOST notification that a connection has been successfully opened.
-- (void)connected;
-
-// HOST notification for a change in connections status.
-- (void)connectionStatus:(NSString*)statusMessage;
-
-// HOST notification that a connection has failed.
-- (void)connectionFailed:(NSString*)errorMessage;
-
-// A new Canvas (desktop) update has arrived.
-- (void)applyFrame:(const webrtc::DesktopSize&)size
-            stride:(NSInteger)stride
-              data:(uint8_t*)data
-             rects:(const std::vector<webrtc::DesktopRect>&)regions;
-
-// A new Cursor (mouse) update has arrived.
-- (void)applyCursor:(const webrtc::DesktopSize&)size
-            hotspot:(const webrtc::DesktopVector&)hotspot
-         cursorData:(uint8_t*)data;
-@end
-
-#endif  // REMOTING_CLIENT_IOS_BRIDGE_HOST_PROXY_DELEGATE_H_