Revert of Analytic AntiAlias for Convex Shapes (patchset #14 id:260001 of https://codereview.chromium.org/2221103002/ )

Reason for revert:
Breaks iOS build.

Original issue's description:
> Implement AnalyticAA for convex shapes.
>
> Design doc: go/analyticAA
>
> A performance test can be found here: https://docs.google.com/a/google.com/spreadsheets/d/1n9LSjFzrQzx0hovFddWey0GSMXNRjl1oFuSypMlHWZk/edit?usp=sharing
>
> Our best case is filling big triangles, which according to our experiment has ~2.9x speedup. Our worst case is filling small ovals/circles, which has a ~1.06x slowdown.
>
> To see how our new algorithm changes the DM images, see: https://x20web.corp.google.com/~liyuqian/dmdiff/index.html
> The most significant changes are in convexpaths and analytic_antialias_convex
>
> BUG=skia:
> GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2221103002
>
> Committed: https://skia.googlesource.com/skia/+/7795822807478143120c33228b68d2ab3918af2c

TBR=reed@google.com,caryclark@google.com,liyuqian@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Review-Url: https://codereview.chromium.org/2388213003
15 files changed