Remove unnecessary uses of aura::Env::GetDispatcher

ui/views/focus/accelerator_handler.h

Index: ui/views/focus/accelerator_handler.h
diff --git a/ui/views/focus/accelerator_handler.h b/ui/views/focus/accelerator_handler.h
index cf0a880089eaed393395775c40430be89bf14636..c4fe18cab20a1bda60e18e937e938a54ec327cb9 100644
--- a/ui/views/focus/accelerator_handler.h
+++ b/ui/views/focus/accelerator_handler.h
@@ -17,12 +17,6 @@
 
 namespace views {
 
-#if defined(USE_AURA) && defined(USE_X11)
-// Dispatch an XEvent to the RootView. Return true if the event was dispatched
-// and handled, false otherwise.
-bool VIEWS_EXPORT DispatchXEvent(XEvent* xevent);
-#endif  // USE_AURA && USE_X11
-
 // This class delegates the key messages to the associated FocusManager class
 // for the window that is receiving these messages for accelerator processing.
 class VIEWS_EXPORT AcceleratorHandler : public base::MessagePumpDispatcher {