trim unused SkDraw functions

Bug: skia:
Change-Id: I9fcb92c2d4057c45f6bad4594accafc1c6e31455
Reviewed-on: https://skia-review.googlesource.com/c/160025
Reviewed-by: Mike Reed <reed@google.com>
Reviewed-by: Herb Derby <herb@google.com>
Commit-Queue: Mike Reed <reed@google.com>
2 files changed