remove unused parts of SkModeColorFilter

Change-Id: Iaa2d1087b3211ec427d8260fb6d7f80a87c5f480
Reviewed-on: https://skia-review.googlesource.com/140983
Commit-Queue: Mike Klein <mtklein@chromium.org>
Commit-Queue: Brian Osman <brianosman@google.com>
Auto-Submit: Mike Klein <mtklein@chromium.org>
Reviewed-by: Brian Osman <brianosman@google.com>
2 files changed