Update test to not call window.onpopstate

Author: HeroProtagonist

test/integration/test.js

@@ -1205,9 +1205,9 @@ describe('integration', function() {
 
           // can't call history.back() because it will change url of parent document
           // (e.g. document running mocha) ... instead just "emulate" a back button
-          // press by calling replaceState + onpopstate manually
+          // press by calling replaceState
           history.replaceState({}, '', '/bar?a=1#fragment');
-          window.onpopstate();
+
           done();
         },
         function() {