remove unused api

Needs this to land first
https://codereview.chromium.org/2945973002/

Bug: skia:
Change-Id: Ib5db8a528cdf9fd75c7a547a5fc637da7a4bbce0
Reviewed-on: https://skia-review.googlesource.com/20304
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
1 file changed