clean code

resource/js/app.js

@@ -14,7 +14,6 @@ import SeenUserList     from './components/SeenUserList';
 import RevisionPath     from './components/Page/RevisionPath';
 import RevisionUrl      from './components/Page/RevisionUrl';
 import BookmarkButton   from './components/BookmarkButton';
-//import PageComment  from './components/PageComment';
 
 if (!window) {
   window = {};
@@ -64,7 +63,6 @@ const componentMappings = {
   'page-attachment': <PageAttachment pageId={pageId} pageContent={pageContent} crowi={crowi} />,
 
   //'revision-history': <PageHistory pageId={pageId} />,
-  //'page-comment': <PageComment />,
   'seen-user-list': <SeenUserList pageId={pageId} crowi={crowi} />,
   'bookmark-button': <BookmarkButton pageId={pageId} crowi={crowi} />,
 };