No longer used and troublesome to use, so remove.
Change-Id: Idad9dd3325443f7e546465abf551de9784d9f829
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/352512
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>