chore(XoApp): unnecessary to validate children prop

src/xo-app/index.js

@@ -6,10 +6,7 @@ import { Notification } from 'notification'
 // import {
 //   keyHandler
 // } from 'react-key-handler'
-import {
-  propTypes,
-  routes
-} from 'utils'
+import { routes } from 'utils'
 
 import About from './about'
 import Backup from './backup'
@@ -38,9 +35,6 @@ import Vm from './vm'
   user: User,
   'vms/:id': Vm
 })
-@propTypes({
-  children: propTypes.node
-})
 export default class XoApp extends Component {
   componentDidMount () {
     this.refs.bodyWrapper.style.minHeight = this.refs.menu.getWrappedInstance().height + 'px'