Revert of add parallel public API for recording SkLiteDL. (patchset #1 id:1 of https://codereview.chromium.org/2246893002/ )

Reason for revert:
looking like we won't need this

Original issue's description:
> add parallel public API for recording SkLiteDL.
>
> The API is restricted to pretty much just what Derek calls,
> but it's enough that we can switch testing over to use it.
>
> BUG=skia:
> GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2246893002
>
> Committed: https://skia.googlesource.com/skia/+/ced26a3d6b77d3a6744a8ccb8eff23eda45fc867

TBR=djsollen@google.com,reed@google.com,mtklein@chromium.org
# 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/2243393002
3 files changed