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This reverts commit 6b8ca1f7.

Reason for revert: crbug/938162

Original change's description:
> device/fido/mac: add more specific check for TouchID availability
>
> Prior to macOS 10.13.2, the only way to check for TouchID was to check
> for the ability to evaluate the LAPolicyDeviceOwnerAuthenticationWithBiometrics
> policy. 10.13.2 introduced a more granular check for LABiometryTypeTouchID.
>
> This PR ensures on systems after macOS 10.13.2 that we check for this specific
> biometry, and fall back to to the old check if we do not have access to this new enum.
>
> R=​martinkr@google.com
>
> Bug: N/A
> Change-Id: I3a3d2d332547b09cf3c6e062709ed06b6e1a052d
> Reviewed-on: https://chromium-review.googlesource.com/c/1487811
> Reviewed-by: Robert Sesek <rsesek@chromium.org>
> Reviewed-by: Martin Kreichgauer <martinkr@google.com>
> Commit-Queue: Martin Kreichgauer <martinkr@google.com>
> Cr-Commit-Position: refs/heads/master@{#636651}

TBR=rsesek@chromium.org,martinkr@google.com,shelley.vohr@gmail.com

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

Bug: 938162
Change-Id: Ieba6da8626b9021df029fc95a9345534a9a67d45
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1504308
Commit-Queue: Martin Kreichgauer <martinkr@google.com>
Reviewed-by: Martin Kreichgauer <martinkr@google.com>
Cr-Commit-Position: refs/heads/master@{#637895}