Avoiding storeSubscription from being passed down as props to Fieldset. Fixes #750

Author: davidkpiano

src/components/fieldset-component.js

@@ -14,6 +14,7 @@ const propTypes = {
     dispatch: PropTypes.func,
     getState: PropTypes.func,
   }),
+  storeSubscription: PropTypes.any,
 };
 
 class Fieldset extends Component {