display: Don't wake up the main loop anymore

This is not needed because GTK must be run in the main thread these days,
which is the same one that runs the main loop. So when this function is
called, the main loop is awake.

https://bugzilla.gnome.org/show_bug.cgi?id=550989

gdk/gdkdisplay.c

@@ -492,8 +492,6 @@ gdk_display_put_event_nocopy (GdkDisplay *display,
                               GdkEvent   *event)
 {
   _gdk_event_queue_append (display, event);
-  /* If the main loop is blocking in a different thread, wake it up */
-  g_main_context_wakeup (NULL);
 }
 
 /**