With and without infra_staging flag testrunner behaves the same for old
features. This CL removes duplicate tests testing the same behavior.

R=machenbach@chromium.org
CC=yangguo@chromium.org,sergiyb@chromium.org

No-Try: true
Bug: v8:8174
Change-Id: Icf7bea15b2343b90697016d050fa0d918a99997d
Reviewed-on: https://chromium-review.googlesource.com/c/1424859Reviewed-by: Sergiy Belozorov <sergiyb@chromium.org>
Commit-Queue: Tamer Tas <tmrts@chromium.org>
Cr-Commit-Position: refs/heads/master@{#58951}