[skif] Remove legacy Lighting filter implementations

Bug: skia:9282
Bug: b/263134496
Change-Id: I1bb6dcff7d0b310264347e37c0fed78891e3b98b
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/716116
Reviewed-by: Robert Phillips <robertphillips@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
1 file changed