Remove support for uncommon/outdated font formats

This reduces Flutter's binary size by ~127 KB uncompressed or 80 KB compressed.

Going forward, we intent to only support the following formats:

* TrueType fonts (TTF) and TrueType collections (TTC)
* CFF fonts
* OpenType fonts (OTF, both TrueType and CFF variants) and OpenType collections (OTC)
* SFNT-based bitmap fonts, including color Emoji

Support for all other formats (including mac dfont) has been removed.

Change-Id: I5932cbfb9a450c97c911de55f505bd228e593a69
3 files changed