Fix test_button03 UNEXPECTED PASS

dom/tests/mochitest/dom-level2-html/test_button03.html

@@ -97,11 +97,7 @@ testNode = nodeList.item(0);
 
       vfaction = formNode.action;
 
-      // its not clear that this test is valid
-      // mozilla returns a fully expanded uri
-      //assertEquals("formLink","...",vfaction);
-      todo_is(vfaction, "...", "formLink");
-       
+      assertEquals("formLink","...",vfaction);
 }
 
 </script>