Revert of Fix 4444 on Vulkan devices who don't support RGBA_4444 (patchset #4 id:60001 of https://codereview.chromium.org/2238563002/ )

Reason for revert:
test failing on some gpus

Original issue's description:
> Fix 4444 on Vulkan devices who don't support RGBA_4444
>
> BUG=skia:
> GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2238563002
>
> Committed: https://skia.googlesource.com/skia/+/637b3bf2b9c10398d823bd015a722842d4f2f971

TBR=bsalomon@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/2240713003
4 files changed