Make comment above `util::fs::remove_matching` a doc comment (#9051)

Just this one little thing, noticed it while working on an unrelated
pull request.

Release Notes:

- N/A
af564242e1Valentine Briese committed on 3/8/2024, 5:15:52 AM· committed by GitHubparentaa7be4b
1 file changedLine totals unavailable