test: remove extra process.exit()

process.exit() has a tendency to hide test failures because
it forces the process to exit. This test doesn't need the
process.exit(), so this commit removes it.

PR-URL: #29873
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Yongsheng Zhang <zyszys98@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

test/parallel/test-http2-connect-options.js

@@ -36,7 +36,6 @@ server.listen(0, '127.0.0.1', common.mustCall(() => {
     client.close();
     req.close();
     server.close();
-    process.exit();
   }));
   req.end();
 }));