Remove BLACK LARGE SQUARE and other black glyphs from font about emojione-color-font

[13rac1]

Thank you for the detailed issue. :)

This problem is due to #22 and realistically is a bug in the build system.

[13rac1]

The other reason for this is that the b&w glyphs are automatically generated from the color versions: https://github.com/eosrei/emojione-color-font/blob/9c2b5260aee756744ec7d19f46d858a8d3f03643/Makefile#L98-L111 It took me a long time to work out this method. Any adjustments/changes to make them better is appreciated.

[erjiang]

I understand that the b&w glyphs are auto-generated. Maybe some glyphs can have a "override" B&W SVG, and the build will skip auto-generating B&W versions for those?

Since you are using potrace, there may be something clever that could be done with doing a b/w threshold trace... but that seems unreliable. Or glyphs that get traced into just one shape (monochrome) are filled in instead of being just an outline.

[13rac1]

Maybe some glyphs can have a "override" B&W SVG, and the build will skip auto-generating B&W versions for those?

It's an option, but not something I want to deal with right now. Fontforge cannot handle many of these SVGs in their default format, so they need to be simplified. I'm open to PRs for it though.

b/w threshold trace
I've adjusted that many times. The current settings are reliable, but something better would be awesome.

I'm closing this for now. The primary issue is described and will be fixed by #22. Maybe that will be enough? Please try additional methods and open a PR if you find something better. Thank you!