removed extra comment

Author: didoo

packages/components/addon/components/hds/alert/index.js

@@ -26,7 +26,6 @@ export default class HdsAlertIndexComponent extends Component {
    * @method Alert#classNames
    * @return {string} The "class" attribute to apply to the component.
    */
-  // "hds-alert"
   get classNames() {
     let classes = ['hds-alert'];