Revert of Extend SkFontMgr_Custom to cover ttc, otf, pfb. (patchset #2 id:20001 of https://codereview.chromium.org/672723002/)

Reason for revert:
Reverting as this appears to be causing issues with color fonts on Android.

Original issue's description:
> Extend SkFontMgr_Custom to cover ttc, otf, pfb.
>
> Adds ability to test ScanFont with Type1 (pfb) fonts
> and fonts with multiple faces (ttc).
>
> Committed: https://skia.googlesource.com/skia/+/ee0c2e4fd429424beaa35f29e7f656997ba3f115

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

Review URL: https://codereview.chromium.org/685803003