fix: remove redundant declaration

assets/js/oauth.js

@@ -43,7 +43,6 @@ const parseQueryString = searchQuery => {
     return {};
   }
   const segments = searchQuery.split("&").map(s => s.split("="));
-  const queryString = {};
   const queryString = segments.reduce((obj, el) => ({ ...obj, [el[0]]: el[1] }), {});
   return queryString;
 };