We don't need this class anymore.
Pull request: https://github.com/WebKit/WebKit/pull/1779
While there build errors on the GTK and WPE bots while landing this change, I'm fairly confident that a clean build would resolve this since the complaint is about a resource that was removed and I think a script needs to re-run.
Committed 251869@main (e55176eb756b): <https://commits.webkit.org/251869@main> Reviewed commits have been landed. Closing PR #1779 and removing active labels.
<rdar://problem/95973076>