test: remove skip of OS X bug

Three tests are skipped because of Applie bug 17894467. That bug exists
in OS X 10.10, but we no longer support 10.10 (and neither does Apple).
Remove the test-skipping.

PR-URL: https://github.com/nodejs/node/pull/22546


Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
Reviewed-By: Daniel Bevenius <daniel.bevenius@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>