Cleanup unused Javascript (#3027)

* chore(js): be stricter about dead code warnings

* chore(js): remove dead code and unused exports

* rebase

* chore: remove unused files

* chore(deps): remove unused prop-types dep

* chore(js): remove unused function

* chore(deps): remove + check unused deps

* chore(js): remove unused exports. Closes #3036

web/components/stores/eventhandlers/connected-client-info-handler.ts

@@ -16,4 +16,3 @@ export function handleConnectedClientInfoMessage(
     isModerator: scopes?.includes('MODERATOR'),
   });
 }
-export default handleConnectedClientInfoMessage;