These are no longer used, we can delete them.
Created attachment 353876 [details] v1 patch.
Created attachment 353878 [details] v2 patch.
Created attachment 353879 [details] patch for landing
Committed r237810: <https://trac.webkit.org/changeset/237810>
<rdar://problem/45810048>
<rdar://problem/45810051>