Revert of Add Gr*Proxy classes (patchset #10 id:220001 of https://codereview.chromium.org/1937553002/ )

Reason for revert:
ASAN

Original issue's description:
> Add Gr*Proxy classes
>
> This isn't wired in anywhere yet.
>
> GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1937553002
>
> Committed: https://skia.googlesource.com/skia/+/de5bf0cfeca908b81a28cc50065f7bc2da3d2fd1
>
> Committed: https://skia.googlesource.com/skia/+/92605b35efa0155c44d24bd8415b4cc1db8831db

TBR=bsalomon@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review-Url: https://codereview.chromium.org/1944953002
25 files changed