Update ChallengeFilters.jsx

Author: rashmi73

src/shared/components/challenge-listing/Filters/ChallengeFilters.jsx

@@ -6,7 +6,6 @@ import PT from 'prop-types';
 import SwitchWithLabel from 'components/SwitchWithLabel';
 import { challenge as challengeUtils } from 'topcoder-react-lib';
 import { COMPETITION_TRACKS as TRACKS } from 'utils/tc';
-import _ from 'lodash';
 
 import ChallengeSearchBar from './ChallengeSearchBar';
 import EditTrackPanel from './EditTrackPanel';