Revert "test: mark async-hooks/test-callback-error as flaky"

This reverts commit 59c8abf.

PR-URL: #22655
Reviewed-By: Denys Otrishko <shishugi@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: George Adams <george.adams@uk.ibm.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

Author: addaleax

test/async-hooks/async-hooks.status

@@ -13,8 +13,6 @@ test-statwatcher: PASS,FLAKY
 [$system==linux]
 # https://github.com/nodejs/node/issues/21425
 test-statwatcher: PASS,FLAKY
-# https://github.com/nodejs/node/issues/15985
-test-callback-error: PASS,FLAKY
 
 [$system==macos]