Super-Haxagon download options have incompatible files

[TophattedWasTaken]

The downloads include both flatpak and tns (a TI Nspire file) as download options alongside the 3dsx and cia. Neither of those will work on 3DS, so they should be removed.

As someone who doesn't understand the different options for the json files (is there documentation somewhere?), the only way I found was to add the file types to the blacklist, but I'm assuming there's a better way (or maybe not, adding them to the blacklist would be convenient for the future)