router.jsx: Remove unnecessary arguments

The two arguments `state` and `onEnter` not required. In the route when `/dashboard` matches, it is directed to `/` using browserHistory.push().

Fixes #137

Author: Aditya Agarwal

src/router.jsx

@@ -27,7 +27,7 @@ import {parseRoute, buildRoute} from './route-utils';
 const routes = [
   // Redirect from `/dashboard` to `/`
   { path: '/dashboard',
-    onEnter: (state, replace) => browserHistory.push('/')
+    onEnter: () => browserHistory.push('/')
   },
   { path: '/',
     component: App,