hmi-controller: remove duplicate commit_changes in random mode

Previous code cleaned up surfaces in layer once and then added
surfaces to a layer in random. In this flow, two commitchanges are
required.

Signed-off-by: Nobuhiko Tanibata <NOBUHIKO_TANIBATA@xddp.denso.co.jp>
[WATARU_NATSUME@xddp.denso.co.jp: Removes unnecessary check]
Signed-off-by: Wataru Natsume <WATARU_NATSUME@xddp.denso.co.jp>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>

ivi-shell/hmi-controller.c

@@ -424,18 +424,9 @@ mode_random_replace(struct hmi_controller *hmi_ctrl,
 
 	wl_list_for_each(application_layer, layer_list, link) {
 		layers[layer_idx] = application_layer;
-		ivi_layout_interface->layer_set_render_order(layers[layer_idx]->ivilayer,
-							NULL, 0);
 		layer_idx++;
 	}
 
-	/*
-	 * This commit change is needed because ivisurface can not belongs to several layers
-	 * at the same time. So ivisurfaces shall be removed from layers once and then set them
-	 * to layers randomly.
-	 */
-	ivi_layout_interface->commit_changes();
-
 	for (i = 0; i < surface_length; i++) {
 		ivisurf = pp_surface[i];