Remove graphite code from src/effects

Note the default implementation of SkColorFilterBase::addToKey
is handled in the kNoOp switch case.

Change-Id: I963098148a1b9e1b40e5ff53ddc885e23f5e8517
Bug: skia:13983
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/728917
Commit-Queue: Kevin Lubick <kjlubick@google.com>
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
23 files changed