clean up dead x86 filter opts code

clean up dead x86 filter opts code

This is dead after removing shadeSpan16().

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1553233004
CQ_EXTRA_TRYBOTS=client.skia:Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-SKNX_NO_SIMD-Trybot

Committed: https://skia.googlesource.com/skia/+/e56c626a441b62880df201009aa3c8afec9587a8

[mtklein_C, 2016-01-05 14:25:24]

Description was changed from

==========
clean up dead x86 filter opts code

This is dead after removing shadeSpan16().

BUG=skia:
==========

to

==========
clean up dead x86 filter opts code

This is dead after removing shadeSpan16().

BUG=skia:
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
CQ_EXTRA_TRYBOTS=client.skia:Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-SKNX_NO_SIMD-Trybot
==========

[mtklein_C, 2016-01-05 14:26:41]

The CQ bit was checked by mtklein@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-01-05 14:26:46]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1553233004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1553233004/1

[mtklein_C, 2016-01-05 14:28:10]

mtklein@chromium.org changed reviewers:
+ reed@google.com

[commit-bot: I haz the power, 2016-01-05 14:43:17]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-01-05 14:43:18]

Dry run: This issue passed the CQ dry run.

[reed1, 2016-01-05 15:08:25]

sweet
lgtm

[mtklein_C, 2016-01-05 15:12:07]

The CQ bit was checked by mtklein@chromium.org

[commit-bot: I haz the power, 2016-01-05 15:12:16]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1553233004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1553233004/1

[commit-bot: I haz the power, 2016-01-05 15:12:54]

Description was changed from

==========
clean up dead x86 filter opts code

This is dead after removing shadeSpan16().

BUG=skia:
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
CQ_EXTRA_TRYBOTS=client.skia:Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-SKNX_NO_SIMD-Trybot
==========

to

==========
clean up dead x86 filter opts code

This is dead after removing shadeSpan16().

BUG=skia:
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
CQ_EXTRA_TRYBOTS=client.skia:Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-SKNX_NO_SIMD-Trybot

Committed:
https://skia.googlesource.com/skia/+/e56c626a441b62880df201009aa3c8afec9587a8
==========

[commit-bot: I haz the power, 2016-01-05 15:12:55]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/e56c626a441b62880df201009aa3c8afec9587a8