SSIA Raising this bug as separate to remove 'captions.css' and then in 'Block' bug, I will explore how 'text-tracks.css' and 'mediaControls.css' have duplicates. Thanks!
PR - https://github.com/WebKit/WebKit/pull/23420
Committed 273775@main (2b0818bd2540): <https://commits.webkit.org/273775@main> Reviewed commits have been landed. Closing PR #23420 and removing active labels.
<rdar://problem/121948601>