refactor(interpolate): remove redundant $watchGroup param

Author: marcin-wosinek

src/ng/interpolate.js

@@ -294,7 +294,7 @@ function $InterpolateProvider() {
                 listener.call(this, currValue, values !== oldValues ? lastValue : currValue, scope);
               }
               lastValue = currValue;
-            }, objectEquality);
+            });
           }
         });
       }