test: remove unused parameter

PR-URL: https://github.com/nodejs/node/pull/17188
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: James M Snell <jasnell@gmail.com>

test/sequential/test-async-wrap-getasyncid.js

@@ -173,7 +173,7 @@ if (common.hasCrypto) { // eslint-disable-line crypto-check
   const tcp_wrap = process.binding('tcp_wrap');
   const server = net.createServer(common.mustCall((socket) => {
     server.close();
-    socket.on('data', (x) => {
+    socket.on('data', () => {
       socket.end();
       socket.destroy();
     });