compositor: remove dead code from weston_output_move()

Also fixes a theoretical memory leak as the region was never fini'd.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>

src/compositor.c

@@ -3754,7 +3754,6 @@ weston_output_init_geometry(struct weston_output *output, int x, int y)
 WL_EXPORT void
 weston_output_move(struct weston_output *output, int x, int y)
 {
-	pixman_region32_t old_region;
 	struct wl_resource *resource;
 
 	output->move_x = x - output->x;
@@ -3763,9 +3762,6 @@ weston_output_move(struct weston_output *output, int x, int y)
 	if (output->move_x == 0 && output->move_y == 0)
 		return;
 
-	pixman_region32_init(&old_region);
-	pixman_region32_copy(&old_region, &output->region);
-
 	weston_output_init_geometry(output, x, y);
 
 	output->dirty = 1;