remove lowp bilerp_clamp_8888 stage

I encountered some trouble getting this turned on in Chromium,
so we've got some undesirable skew between what's tested and shipping.

No one has complained about software rasterization perf to me lately,
so let's just drop this, keeping the already-launched highp
bilerp_clamp_8888 stage.

Change-Id: I9a6557d9b468765989f97369a976c5028f81eab3
Reviewed-on: https://skia-review.googlesource.com/135563
Commit-Queue: Mike Klein <mtklein@chromium.org>
Commit-Queue: Florin Malita <fmalita@chromium.org>
Auto-Submit: Mike Klein <mtklein@chromium.org>
Reviewed-by: Florin Malita <fmalita@chromium.org>
1 file changed