Remove gdk_windowing_{get_device_state,window_at_device_position}
The !trusted workaround code is pushed down into the GdkDevice subclasses, and we use the device vfuncs directly in gdkdisplay.c
The !trusted workaround code is pushed down into the GdkDevice subclasses, and we use the device vfuncs directly in gdkdisplay.c