Fix Flow code, remove obsolete comments [ci e2e]

frontend/src/metabase/dashboard/containers/DashboardApp.jsx

@@ -47,12 +47,16 @@ const mapDispatchToProps = {
     onChangeLocation: push
 }
 
+type DashboardAppState = {
+    addCardOnLoad: number|null
+}
+
 @connect(mapStateToProps, mapDispatchToProps)
 @title(({ dashboard }) => dashboard && dashboard.name)
 export default class DashboardApp extends Component {
-    state = {
+    state: DashboardAppState = {
         addCardOnLoad: null
-    }
+    };
 
     componentWillMount() {
         let options = parseHashOptions(window.location.hash);

frontend/src/metabase/dashboard/hoc/DashboardControls.jsx

@@ -86,7 +86,6 @@ export default (ComposedComponent: ReactClass<any>) =>
             };
 
             updateDashboardParams = () => {
-                // should I do it here?
                 let options = parseHashOptions(window.location.hash);
                 const setValue = (name, value) => {
                     if (value) {
@@ -206,7 +205,6 @@ export default (ComposedComponent: ReactClass<any>) =>
                         onNightModeChange={this.setNightMode}
                         onFullscreenChange={this.setFullscreen}
                         onRefreshPeriodChange={this.setRefreshPeriod}
-                        addDashboardOnLoad={this.addDashboardOnLoad}
                     />
                 );
             }