removed reference to lib/tooltip.js

resources/assets/javascripts/init.js

@@ -76,7 +76,6 @@ import Statusgroups from './lib/statusgroups.js';
 import study_area_selection from './lib/study_area_selection.js';
 import Table from './lib/table.js';
 import TableOfContents from './lib/table-of-contents.js';
-import Tooltip from './lib/tooltip.js';
 import Tour from './lib/tour.js';
 import * as Gettext from './lib/gettext';
 import UserFilter from './lib/user_filter.js';