Revert of Support GL_SAMPLES queries in null contexts (patchset #2 id:20001 of https...

Revert of Support GL_SAMPLES queries in null contexts (patchset #2 id:20001 of https://codereview.chromium.org/2085043002/ )

Reason for revert:
Chrome unit tests failing (eg https://codereview.chromium.org/2085243002)

Original issue's description:
> Support GL_SAMPLES queries in null contexts
>
> BUG=skia:
> GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2085043002
>
> Committed: https://skia.googlesource.com/skia/+/64b92a59294a2f73448b3fa8f36f39079f032521

TBR=bsalomon@google.com,csmartdalton@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/2089013003