Remove deprecated method

index.js

@@ -18,7 +18,7 @@ scheduler.register_existing_events();
 var auth = function (req, res, next) {
   function unauthorized(res) {
     res.set('WWW-Authenticate', 'Basic realm=Authorization Required');
-    return res.send(401);
+    return res.sendStatus(401);
   };
 
   var user = basic_auth(req);