Fix #11397. Shush Firefox warning by re-breaking #6932 for BB 4.7.

At this point BlackBerry 4.7 (and related ancient browsers) should be scarce (released circa 2008) so #6932 will be closed wontfix for this edge case.

src/attributes.js

@@ -215,14 +215,6 @@ jQuery.fn.extend({
 
 jQuery.extend({
 	valHooks: {
-		option: {
-			get: function( elem ) {
-				// attributes.value is undefined in Blackberry 4.7 but
-				// uses .value. See #6932
-				var val = elem.attributes.value;
-				return !val || val.specified ? elem.value : elem.text;
-			}
-		},
 		select: {
 			get: function( elem ) {
 				var value, i, max, option,