Yes, you can host all those files locally.
There are numerous added benefits to doing it, in fact…especially if you’re at the point in your development where you’re setting cache-control headers.
Here’s what you should do:
- Host the google fonts locally
- Host your own css
- The only reason to use the maps API is if you’re displaying maps on your site. Are you using maps for anything? If not, you can probably get rid of it…