Webfont audit

[ndorfin]

Hi! 👋

I thought the use of webfonts on the site was a little out of control, so I did an audit and found the following:

1. It looks like Work Sans is being used for most of the site: >99%
2. Source Code Pro is intended to be used for sponsors names in the sponsors partial, if the sponsor.show_name boolean is true. But none of the sponsors are represented as such.
3. Source Sans Pro is only used once in the .hero_date element on the homepage. This could be replaced with a suitable cross-browser font, saving us 2 blocking HTTP requests and ~15KB.
4. YoungSerif and OleoSwash are declared, imported, make 1 blocking request each, but are never used.

Recommendations:

1. Leave Work Sans as is.
2. Remove Source Code Pro
3. Replace Source Sans Pro with something like Droid Sans or sans-serif
4. Remove YoungSerif and OleoSwash

Next steps:

We could see a healthy improvement in rendering performance if we remove these fonts. I'm happy to do the work with your blessing :)

-S

[mermop]

We were initially using Young Serif and Oleo Swash but they were replaced in #22. The .hero_date element should probably be Work Sans now - then we can remove the other 4.

[mermop]

Turns out Oleo Swash is still being used, it's the logotype font, it's only used once now so there could be some argument for replacing that one use with a SVG but I'm not too bothered