[skif] Remove legacy SkBlendImageFilter impl

Bug: skia:9282
Bug: b/263135798
Bug: b/263133781
Change-Id: I7cd4bd6aca0ffa819f4284b16156e2f99d3ef753
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/705761
Auto-Submit: Michael Ludwig <michaelludwig@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
1 file changed