Revert of SkPDF: Subset Type3 (fallback) font (patchset #8 id:200001 of https://codereview.chromium.org/2231483002/ )

Reason for revert:
internal failing

Original issue's description:
> SkPDF: Subset Type3 (fallback) font
>
> Motivation: significant file-size reduction.
>
> Also: SkPDFFont::subsetFont() returns a sk_sp<SkPDFObject>
> rather than a SkPDFFont*.
>
> SkPDFType3Font constructor no longer populates font info;
> relies on subsetting.
>
> SkPDFFont::Create is easier to read
>
> Also: SkPDFType3Font are scaled by emSize rather than 1000.
>
> GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2231483002
>
> Committed: https://skia.googlesource.com/skia/+/88b138da99328b04cae9a8ee19c3882b8847a550

TBR=bungeman@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review-Url: https://codereview.chromium.org/2232283003
4 files changed