test: remove unnecessary linter comment

Some would say it's the linter's job to determine what
looks right.

PR-URL: https://github.com/nodejs/node/pull/25013


Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Roman Reiss <me@silverwind.io>