test: handle errors correctly in GC http test

In test-gc-http-client-timeout.js, res.resume is not a function if error occurs. Remove the error handler. PR-URL: #22185 Reviewed-By: Luigi Pinca <[email protected]> Reviewed-By: Rich Trott <[email protected]>

Author: oyyd

test/parallel/test-gc-http-client-timeout.js

@@ -39,7 +39,7 @@ function getall(){
 pathname: '/',
 port: server.address().port
 },cb);
-req.on('error',cb);
+
 req.setTimeout(10,function(){
 console.log('timeout (expected)');
 });