refactor: remove unused class

Author: andreishket

vis/js/templates/listentry/Citations.tsx

@@ -9,8 +9,8 @@ const Citations = ({ number, label }: CitationsProps) => {
   return (
     // html template starts here
     <div className="list_readers">
-      <span className="list_readers_entity">{label}</span>{" "}
-      <span className="num_readers">{number}</span>&nbsp;
+      <span className="list_readers_entity">{label}</span> <span>{number}</span>
+      &nbsp;
     </div>
     // html template ends here
   );