ivi-shell: remove a code which expects only a screen in the system.

It breaks from wl_list_for_each of screens when the frist screen found.

Signed-off-by: Nobuhiko Tanibata <NOBUHIKO_TANIBATA@xddp.denso.co.jp>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>

ivi-shell/ivi-layout.c

@@ -851,8 +851,6 @@ commit_screen_list(struct ivi_layout *layout)
 				ivisurf->surface->output = iviscrn->output;
 			}
 		}
-
-		break;
 	}
 }