Revert of add setter on SkPaint that takes sk_sp (patchset #1 id:1 of https://codereview.chromium.org/1769803002/ )

Reason for revert:
investigate leak

Original issue's description:
> add setter on SkPaint that takes sk_sp
>
> BUG=skia:
> GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1769803002
>
> TBR=
>
> Committed: https://skia.googlesource.com/skia/+/a917eba6ea8a6936f2c9271e487b14d14b99c98e

TBR=
# 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/1771613002
2 files changed