Revert "test: mark test-runner-output as flaky"

This reverts commit 717e233.

Refs: fef7927cc3a7
PR-URL: #49905
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Moshe Atlow <moshe@atlow.co.il>
Reviewed-By: Michael Dawson <midawson@redhat.com>

Author: lpinca

test/parallel/parallel.status

@@ -5,8 +5,6 @@ prefix parallel
 # sample-test                        : PASS,FLAKY
 
 [true] # This section applies to all platforms
-# https://github.com/nodejs/node/issues/49853
-test-runner-output: PASS,FLAKY
 
 [$system==win32]
 # https://github.com/nodejs/node/issues/41206