Delete SkBitmap::copyTo()

Bug: skia:6465
Change-Id: Ied95fe3aaed9126906fde15bfda73bd6597e3347
Reviewed-on: https://skia-review.googlesource.com/15220
Reviewed-by: Matt Sarett <msarett@google.com>
Commit-Queue: Matt Sarett <msarett@google.com>
2 files changed