There is an ongoing issue with the code Webflow producess. Once a Font family has been added is appears in the code regardless if you have removed the family from all classes and don't utilise it on your site. There is no way to remove these font families or track if they are showing in your code. It makes a small difference to percormance, sure, but often a few extra miller sec off a load time can make all the difference. Not to mention is this issue is combined with large image files that are required for a design, it can greatly impact load time.