Revert "Roll ChromeOS Silvermont AFDO profile from...

Revert "Roll ChromeOS Silvermont AFDO profile from 86-4181.3-1594638142-benchmark-86.0.4205.0-r1 to 86-4181.3-1594638142-benchmark-86.0.4206.0-r1"

This reverts commit 54a48146.

Reason for revert: Seems to have caused a crash:

https://ci.chromium.org/p/chromium/builders/ci/Linux%20ChromiumOS%20MSan%20Tests/19910
https://logs.chromium.org/logs/chromium/buildbucket/cr-buildbucket.appspot.com/8874314486948271696/+/steps/oobe_only_browser_tests__experimental_/0/logs/Deterministic_failure:_DemoSetupArcSupportedTest.OfflineSetupFlowErrorDefault__status_CRASH_/0

Original change's description:
> Roll ChromeOS Silvermont AFDO profile from 86-4181.3-1594638142-benchmark-86.0.4205.0-r1 to 86-4181.3-1594638142-benchmark-86.0.4206.0-r1
> 
> If this roll has caused a breakage, revert this CL and stop the roller
> using the controls here:
> https://autoroll.skia.org/r/cros-afdo-silvermont-chromium
> Please CC c-compiler-chrome@google.com on the revert to ensure that a human
> is aware of the problem.
> 
> To report a problem with the AutoRoller itself, please file a bug:
> https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug
> 
> Documentation for the AutoRoller is here:
> https://skia.googlesource.com/buildbot/+doc/master/autoroll/README.md
> 
> Tbr: c-compiler-chrome@google.com
> Change-Id: I0ccba979d989b4ea0285003791734f346b4bc495
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2306397
> Reviewed-by: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
> Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
> Cr-Commit-Position: refs/heads/master@{#789775}

TBR=llozano@chromium.org,chromium-autoroll@skia-public.iam.gserviceaccount.com

Change-Id: I4daed93491b8fb8c0ee83a2e307fb405635c763b
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2305827Reviewed-by: Alice Boxhall <aboxhall@chromium.org>
Commit-Queue: Alice Boxhall <aboxhall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#789804}

chromeos/profiles/silvermont.afdo.newest.txt

-chromeos-chrome-amd64-silvermont-86-4181.3-1594638142-benchmark-86.0.4206.0-r1-redacted.afdo.xz
+chromeos-chrome-amd64-silvermont-86-4181.3-1594638142-benchmark-86.0.4205.0-r1-redacted.afdo.xz