Revert "Introduce perftests for persistent cache operations."

This reverts commit c4580c0248e6ca7d218725b700ebf820c098e73f.

Reason for revert:
LUCI Bisection has identified this change as the culprit of a build failure. See the analysis: https://ci.chromium.org/ui/p/chromium/bisection/compile-analysis/b/8713791646696051809

Sample failed build: https://ci.chromium.org/b/8713791646696051809

If this is a false positive, please report it at http://b.corp.google.com/createIssue?component=1199205&description=Analysis%3A+https%3A%2F%2Fchromium-review.googlesource.com%2Fc%2Fchromium%2Fsrc%2F%2B%2F6578891&format=PLAIN&priority=P3&title=Wrongly+blamed+https%3A%2F%2Fci.chromium.org%2Fui%2Fp%2Fchromium%2Fbisection%2Fcompile-analysis%2Fb%2F8713791646696051809&type=BUG

Original change's description:
> Introduce perftests for persistent cache operations.
>
> These performance tests are designed to measure the efficiency
> of key persistent cache operations. This will allow us to track
> performance regressions and improvements over time and will ease to run analysis tools (a.k.a profilers, tracing) over benchmarks.
>
> Bug: 377475540
> Change-Id: I5cd1efef4a8346f7f1cf20b6ea0a1e6d47dfae03
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6578891
> Commit-Queue: Etienne Bergeron <etienneb@chromium.org>
> Reviewed-by: Francois Pierre Doray <fdoray@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1465570}
>

Bug: 377475540
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Change-Id: Ifd4416841731a8b4cf0ac62ceb5ff27bcf12d14c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6588012
Bot-Commit: luci-bisection@appspot.gserviceaccount.com <luci-bisection@appspot.gserviceaccount.com>
Owners-Override: luci-bisection@appspot.gserviceaccount.com <luci-bisection@appspot.gserviceaccount.com>
Commit-Queue: luci-bisection@appspot.gserviceaccount.com <luci-bisection@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#1465612}