Revert "arrow_nav: add KeyUp for parent"

This reverts commit 365b9097cd.

modules/arrow_nav/js/arrow_nav.js

@@ -5,7 +5,6 @@
 		direction = 'ltr',
 		keyPrevious = 37,
 		keyNext = 39,
-		keyUp = 38,
 		keyDelete = 119,
 		url;
 
@@ -61,10 +60,6 @@
 				url = $('.g-paginator .g-text-right a').eq(0).attr("href");
 				break;
 
-			case keyUp:
-				url = $('.g-breadcrumbs li:nth-last-of-type(2) a').eq(0).attr("href");
-				break;
-
 			case keyDelete:
 				$('a.g-dialog-link.g-quick-delete').click();
 				return false;