[Plugin: Jetpack by WordPress.com] Disable WordPress comments?

I’m trying to figure out a way to only allow FB and Twitter comments on my site and to disable the WordPress comments at the same time. Is there a way to do this with the Jetpack plugin? Would I need to hack it somehow? I’ve seen other FB and Twitter plugins but not many, if any at all, combinations of them both. I don’t need people registering on my site either.