BitTorrent represent 16% of downloads.

It made more sense to present direct and BitTorrent downloads
side-by-side when people had to install an extension to verify the
direct download.

It makes less sense now, so let's make the page simpler for the vast
majority:

- People downloading with BitTorrent might do the JavaScript
  verification anyway with little extra additional burden.
- We don't have to advertise BitTorrent so much to people who might not
  be able or willing to install the verification extension.