fix: remove utmSource

UTM Source is no longer used

Author: rakibansary

src/shared/containers/challenge-detail/index.jsx

@@ -290,14 +290,12 @@ class ChallengeDetailPageContainer extends React.Component {
     const {
       auth,
       challengeId,
-      communityId,
       openTermsModal,
       registerForChallenge,
       terms,
     } = this.props;
     if (!auth.tokenV3) {
-      const utmSource = communityId || 'community-app-main';
-      window.location.href = `${config.URL.AUTH}/member?retUrl=${encodeURIComponent(window.location.href)}&utm_source=${utmSource}&regSource=challenges`;
+      window.location.href = `${config.URL.AUTH}/member?retUrl=${encodeURIComponent(window.location.href)}&regSource=challenges`;
     } else if (_.every(terms, 'agreed')) {
       registerForChallenge(auth, challengeId);
     } else {