test: remove test-stdout-close-catch flaky designation

The corresponding issue was closed 3 months ago and it has apparently
been a long time since the failure has been seen in CI.

Refs: #28803

PR-URL: #42045
Reviewed-By: Mestery <mestery@protonmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: James M Snell <jasnell@gmail.com>

Author: Trott

test/parallel/parallel.status

@@ -32,8 +32,6 @@ test-crypto-keygen: SKIP
 [$system==freebsd]
 # https://github.com/nodejs/node/issues/31727
 test-fs-stat-bigint: PASS,FLAKY
-# https://github.com/nodejs/node/issues/28803
-test-stdout-close-catch: PASS,FLAKY
 # https://github.com/nodejs/node/issues/31280
 test-worker-message-port-message-before-close: PASS,FLAKY