Remove the unused PlaybackSessionManagerProxy message 'PictureInPictureActiveChanged'.
<rdar://problem/59658916>
Created attachment 393536 [details] Patch
Comment on attachment 393536 [details] Patch r=me
Comment on attachment 393536 [details] Patch Clearing flags on attachment: 393536 Committed r258441: <https://trac.webkit.org/changeset/258441>
All reviewed patches have been landed. Closing bug.