Revert of Font variations. (patchset #21 id:400001 of https://codereview.chromium...

Revert of Font variations. (patchset #21 id:400001 of https://codereview.chromium.org/1027373002/)

Reason for revert:
Mac failing to build due to CFNumberType in Chromium Canary.

Original issue's description:
> Font variations.
>
> Multiple Master and TrueType fonts support variation axes.
> This implements back-end support for axes on platforms which
> support it.
>
> Committed: https://skia.googlesource.com/skia/+/05773ed30920c0214d1433c07cf6360a05476c97

TBR=reed@google.com,mtklein@google.com,djsollen@google.com,halcanary@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/1128913008