No longer need to check for objects or string of null with the special form treatment and updates to removeAttr

src/attributes.js

@@ -328,8 +328,7 @@ jQuery.extend({
 				ret = elem.getAttribute( name );
 
 				// Non-existent attributes return null, we normalize to undefined
-				// Instead of checking for null, we check for typeof object to catch inputs in IE6/7. Bug #7472
-				return typeof ret === "object" || ret === "null" ?
+				return ret === null ?
 					undefined :
 					ret;
 			}