If it's just cleaning up CSS you're after, I would use UnCSS. Checkout grunt-uncss task or gulp-uncss to hook it up to your build process. We don't currently do

If it's just cleaning up CSS you're after, I would use UnCSS. Checkout grunt-uncss task or gulp-uncss to hook it up to your build process. We don't currently document using the tooling independent of the kit, but you should be able to pluck the package.json and gulpfile.js and edit per your needs. We'll try to get this documented.