test: fix flaky test-http2-session-unref

This test should exit naturally or will timeout on its own, a separate unrefed timer is not necessary. PR-URL: #18589Fixes: #18587 Reviewed-By: Michael Dawson <[email protected]> Reviewed-By: James M Snell <[email protected]> Reviewed-By: Yuta Hiroto <[email protected]> Reviewed-By: Ruben Bridgewater <[email protected]> Reviewed-By: Colin Ihrig <[email protected]>

Author: apapirovski

test/parallel/test-http2-session-unref.js

@@ -49,5 +49,3 @@ server.listen(0, common.mustCall(() =>{
 }));
 server.emit('connection',serverSide);
 server.unref();
-
-setTimeout(common.mustNotCall(()=>{}),1000).unref();