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

This reverts commit 717e233.

Refs: fef7927cc3a7
PR-URL: #49905
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Moshe Atlow <[email protected]>
Reviewed-By: Michael Dawson <[email protected]>

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