fixed eslint

app/assets/javascripts/dispatcher.js

@@ -62,7 +62,6 @@ import ShortcutsIssuable from './shortcuts_issuable';
 import U2FAuthenticate from './u2f/authenticate';
 import Members from './members';
 import memberExpirationDate from './member_expiration_date';
-import DueDateSelectors from './due_date_select';
 import Diff from './diff';
 import ProjectLabelSubscription from './project_label_subscription';
 import SearchAutocomplete from './search_autocomplete';