Revert of Fix bufferIndex check in VulkanWindowContext (patchset #1 id:1 of https://codereview.chromium.org/2363353003/ )

Reason for revert:
Fix not correct.

Original issue's description:
> Fix bufferIndex check in VulkanWindowContext
>
> BUG=skia:
> GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2363353003
>
> Committed: https://skia.googlesource.com/skia/+/e6bd20e62b827a1f26fa491fc628f015d208350f

TBR=jvanverth@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/2370953002
1 file changed