SkCanvas: remove unused SkCanvas::InitFlags

Change-Id: Ib5a0a873ebe6a3c8c671afc1e9f7f102cfee4aa7
Reviewed-on: https://skia-review.googlesource.com/c/159580
Commit-Queue: Hal Canary <halcanary@google.com>
Auto-Submit: Hal Canary <halcanary@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
3 files changed