multi-resource: remove an unnecessary call of wl_display_get_fd()

Signed-off-by: Ryo Munakata <ryomnktml@gmail.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>

clients/multi-resource.c

@@ -258,8 +258,6 @@ create_display(void)
 		exit(1);
 	}
 
-	wl_display_get_fd(display->display);
-
 	wl_list_init(&display->devices);
 
 	return display;