Revert "Enable CECPQ2 for domains eTLD+1s beginning with 'aa'."

This reverts commit 51dfb5a0e6c725136a3d4b06c92df5ace3287591.

Reason for revert: browser_tests is failing on LinuxCFI bot.

Failing tests:
- CECPQ2PolicyTest.CECPQ2EnabledPolicy
- CECPQ2PolicyTest.ChromeVariations

First failure:
- https://ci.chromium.org/p/chromium/builders/ci/Linux%20CFI/19838

Sample log:
https://logs.chromium.org/logs/chromium/buildbucket/cr-buildbucket.appspot.com/8853834725563794912/+/steps/browser_tests/0/logs/Deterministic_failure:_CECPQ2PolicyTest.CECPQ2EnabledPolicy__status_CRASH_/0

Original change's description:
> Enable CECPQ2 for domains eTLD+1s beginning with 'aa'.
>
> While Finch experiments have been run and the problems are below the
> noise floor, some issues have been noted from the larger TLS messages
> used by CECPQ2. (See bug.) But all viable post-quantum key agreement
> algorithms need to put extra bytes in the ClientHello message, so we
> have to make the internet support this.
>
> I stopped a general rollout of this last year because it seemed like a
> bad idea during the beginning of COVID as people moved to working from
> home. This is the restart of that process and is limited, for now, to
> sites whose eTLD+1 begins with 'aa'.
>
> The policy CECPQ2Enabled is added to all this to be disabled. It is also
> automatically disabled if the ChromeVariations policy has been set to
> disable any Finch trials, as requested by the enterprise team.
>
> BUG=930812
>
> Change-Id: I2df8caffe5848962aea4f52cf3107786f2716809
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2643940
> Commit-Queue: Adam Langley <agl@chromium.org>
> Reviewed-by: Emily Stark <estark@chromium.org>
> Reviewed-by: Julian Pastarmov <pastarmovj@chromium.org>
> Reviewed-by: David Benjamin <davidben@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#859108}

Bug: 930812
Change-Id: Id5d442461dde4cd06f204b6a760c45a931460be1
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2730609
Reviewed-by: Takashi Sakamoto <tasak@google.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Takashi Sakamoto <tasak@google.com>
Cr-Commit-Position: refs/heads/master@{#859219}
GitOrigin-RevId: 7a0bd97d5e983d1b509a049bdbf693117edd226d
7 files changed