remove dead code around SkPaint::breakText

-- need to update google3 before landing this

Bug: skia:
Change-Id: Ibb8a5c1a622e77cd4064740b700a983036061ba6
Reviewed-on: https://skia-review.googlesource.com/c/177341
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Mike Reed <reed@google.com>
3 files changed