Revert of Adding BrowsingInstance verification to test of chrome.windows.create API. (patchset #1 id:1 of https://codereview.chromium.org/2873693003/ )

Reason for revert:
The modified test became flaky.

Original issue's description:
> Adding BrowsingInstance verification to test of chrome.windows.create API.
>
> BUG=597750
>
> Review-Url: https://codereview.chromium.org/2873693003
> Cr-Commit-Position: refs/heads/master@{#470409}
> Committed: https://chromium.googlesource.com/chromium/src/+/35b5da108fd0ae4c66c7665a09d0a3d682ce25e5

TBR=lazyboy@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=597750

Review-Url: https://codereview.chromium.org/2870243002
Cr-Commit-Position: refs/heads/master@{#470433}
1 file changed