Revert "Deflaky css/selectors/focus-visible-006.html on WebKit Linux Leak"

This reverts commit e615861a60673c09d75d259f103d6a4f579472c0.

Reason for revert: crbug.com/1186616
The test is persistently failing on WebKit Linux Leak.

Original change's description:
> Deflaky css/selectors/focus-visible-006.html on WebKit Linux Leak
>
> WPT test css/selectors/focus-visible-006.html is flaky on WebKit
> Linux Leak, because the page is still active when the test ends. I added
> action promise variable to end the test after the actions finish.
>
> Bug: 1174806
> Change-Id: I341cc9970dd266a4a023fe253218fa0b96974131
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2732872
> Reviewed-by: Mustaq Ahmed <mustaq@chromium.org>
> Commit-Queue: Lan Wei <lanwei@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#861338}

Bug: 1174806
Change-Id: I1e6711081579aaa28cec2ea150e39fcd121c3c62
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2747380
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Ramin Halavati <rhalavati@chromium.org>
Cr-Commit-Position: refs/heads/master@{#861541}