remove google fonts

[CollinBeczak]

Possible solution to #2720

[jake-low]

I'm all for removing Google Fonts.

This PR makes MapRoulette use the default system-ui font. This looks fine to me on Firefox + macOS (see below). Are you by any chance able to test this on any other platforms, to make sure nothing breaks?

Note: you may also want to change the font stack in tailwind.config.js to remove Roboto. In fact, that list could be simplified to just ["system-ui", "sans-serif"].

With Roboto (loaded from Google Fonts)

With default system fonts

[CollinBeczak]

Tested on chrome, and firefox... i can check on safari

[jake-low]

Tested on chrome, and firefox... i can check on safari

Sorry, should have clarified: I'm mainly concerned about different operating systems (Ubuntu, Windows, etc) which have their own sets of default fonts installed. I don't have machines running either of those OSes so I can't easily test this there. It should work fine though, and I'm fine merging this without specifically testing those. Simplifying the font stack (as you've done) also makes this change less likely to break the UI on systems we haven't tested.