Revert "SkRasterPipeline shader adapter"

This reverts commit 6d11ed2951fadc281433606a8edc6774bed39735.

Build failure: https://chromium-swarm.appspot.com/task?id=3403da0cdee8c210&refresh=10

../../../src/core/SkOpts.cpp -o obj/src/core/libskia.SkOpts.o
In file included from ../../../src/core/SkOpts.cpp:46:
../../../src/opts/SkRasterPipeline_opts.h:1093:11: error: no member named 'Load4' in '(anonymous namespace)::SkNx<8, float>'
    SkNf::Load4(buf, &r, &g, &b, &a);
    ~~~~~~^
1 error generated.

Leak: https://chromium-swarm.appspot.com/task?id=3403df55fd5eaa10&refresh=10

Original change's description:
> SkRasterPipeline shader adapter
> 
> (lifted from https://skia-review.googlesource.com/c/7088/)
> 
> R=​mtklein@google.com,herb@google.com,reed@google.com
> 
> CQ_INCLUDE_TRYBOTS=skia.primary:Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-SKNX_NO_SIMD
> 
> Change-Id: Idddb84069423c5fc535bea0a65a5b21a4d07084d
> Reviewed-on: https://skia-review.googlesource.com/7615
> Commit-Queue: Florin Malita <fmalita@chromium.org>
> Reviewed-by: Mike Klein <mtklein@chromium.org>
> Reviewed-by: Mike Reed <reed@google.com>
> 

TBR=mtklein@chromium.org,mtklein@google.com,herb@google.com,fmalita@chromium.org,reed@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
CQ_INCLUDE_TRYBOTS=skia.primary:Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-SKNX_NO_SIMD

Change-Id: I68c0be3398bde93cd0842baf25b025c5fe1c3df7
Reviewed-on: https://skia-review.googlesource.com/7730
Commit-Queue: Florin Malita <fmalita@chromium.org>
Reviewed-by: Florin Malita <fmalita@chromium.org>
4 files changed