Remove unused CGWindowCaptureSource. Eric tells me it's not currently used, so it can be removed for now.
<rdar://problem/83329399>
Created attachment 438764 [details] Patch
Comment on attachment 438764 [details] Patch r=me
Committed r282820 (241951@main): <https://commits.webkit.org/241951@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 438764 [details].