[ScopedVT] Remove view-transition-is-anchor-auto.html

The UA stylesheet change got reverted in:
https://chromium-review.googlesource.com/c/chromium/src/+/7158018

But this test wasn't removed.

Bug: 446688001, 460415950
Change-Id: Icba62fbf2a132380f37247dc574ce088133be346
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7169948
Auto-Submit: Ian Kilpatrick <[email protected]>
Reviewed-by: Ian Kilpatrick <[email protected]>
Reviewed-by: Vladimir Levin <[email protected]>
Commit-Queue: Ian Kilpatrick <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1546767}

Author: bfgeek