Update test/parallel/test-http-remove-connection-header-persists-connection.js

Co-authored-by: Luigi Pinca <luigipinca@gmail.com>

Author: FliegendeWurst

test/parallel/test-http-remove-connection-header-persists-connection.js

@@ -63,7 +63,7 @@ server.listen(0, function() {
       // Both HTTP/1.1 requests should have used the same socket:
       assert.strictEqual(firstSocket, secondSocket);
 
-      makeHttp10Request(function(socket) {
+      makeHttp10Request(function() {
         server.close();
       });
     });