Mojo: Remove ProxyMessagePipeEndpoint::OnRemove(), etc.

mojo/system/message_pipe_endpoint.h

 // Copyright 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.
 
 #ifndef MOJO_SYSTEM_MESSAGE_PIPE_ENDPOINT_H_
 #define MOJO_SYSTEM_MESSAGE_PIPE_ENDPOINT_H_
 
 #include <stdint.h>
 
 #include <vector>
@@ skipping 57 matching lines @@
   virtual MojoResult AddWaiter(Waiter* waiter,
                                MojoHandleSignals signals,
                                uint32_t context,
                                HandleSignalsState* signals_state);
   virtual void RemoveWaiter(Waiter* waiter, HandleSignalsState* signals_state);
 
   // Implementations must override these if they represent a proxy endpoint. An
   // implementation for a local endpoint needs not override these methods, since
   // they should never be called.
   virtual void Attach(ChannelEndpoint* channel_endpoint);
-  virtual void OnRemove();
 
  protected:
   MessagePipeEndpoint() {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(MessagePipeEndpoint);
 };
 
 }  // namespace system
 }  // namespace mojo
 
 #endif  // MOJO_SYSTEM_MESSAGE_PIPE_ENDPOINT_H_