rm unneeded header, see include/public

Change-Id: Ica26f683a9fd0ef7a624aa081678b619b70c9af8
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/273400
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
1 file changed