Remove typography.css

[cloverich]

When I first started I copied typography from my blog, which I'd generated from https://github.com/kyleamathews/typography.js/

Much later I'm using Tailwind for most things and when it comes to setting up consistent patterns to make typography / theme possible (#225 / #130) it will be easier if I use tailwind everywhere, and rely on some base class names (bg-accent, text-popover, etc)

Anyways delete this file, and fix whatever it breaks, a small number of misc. bits of the app still use it.