Remove unnecessary uses of aura::Env::GetDispatcher

ui/views/focus/accelerator_handler_aura.cc

 // Copyright (c) 2012 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 "ui/views/focus/accelerator_handler.h"
 
 namespace views {
 
 AcceleratorHandler::AcceleratorHandler() {
 }
 
 bool AcceleratorHandler::Dispatch(const base::NativeEvent& event) {
 #if defined(OS_WIN)
   TranslateMessage(&event);
   DispatchMessage(&event);
 #endif  // defined(OS_WIN)
   return true;
 }
 
-#if defined(USE_X11)
-bool DispatchXEvent(XEvent* xev) {
-  return false;
-}
-#endif  // defined(USE_X11)
-
 }  // namespace views