With Metal up and running these are no longer needed.
Change-Id: I79948707060afc3a9d2d3a4d531a7d3e5d08298d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/243696
Commit-Queue: Jim Van Verth <jvanverth@google.com>
Reviewed-by: Eric Boren <borenet@google.com>
