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This reverts commit d4e2b4da.

Reason for revert: Causes failures on the android-pixel4a_power-perf bot.

Original change's description:
> [tools/perf] Enable proxy power metric on Pixel 4a bots
>
> This CL supplies two command-line flags that are necessary to compute
> the proxy power metric (based on CPU usage and power profiles).
>
>  * --fetch-power-profile downloads the power profile from the cloud.
>
>  * --performance-mode=keep disables the Telemetry power management,
>  making it possible to collect cpu_freq events. Note that there will
>  likely be a drop in observed power rails metrics after this CL lands,
>  because devices will use more efficient CPU scheduling policy.
>
> Change-Id: I9aeecd80cda1a883e1994ba70b0a439cd83f8749
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2566995
> Reviewed-by: John Chen <johnchen@chromium.org>
> Commit-Queue: Mikhail Khokhlov <khokhlov@google.com>
> Cr-Commit-Position: refs/heads/master@{#832770}

Bug: 1154788
TBR=johnchen@chromium.org,khokhlov@google.com,chromium-scoped@luci-project-accounts.iam.gserviceaccount.com

# Not skipping CQ checks because original CL landed > 1 day ago.

Change-Id: Ifdf838140e4cb2fb8bf5df321819a0d6901e299c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2589858Reviewed-by: Mikhail Khokhlov <khokhlov@google.com>
Reviewed-by: John Chen <johnchen@chromium.org>
Commit-Queue: Mikhail Khokhlov <khokhlov@google.com>
Commit-Queue: John Chen <johnchen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#836753}