Remove build-sunet-b.torproject.net host
build-sunet-b.torproject.net
was a host that we were using for building Tor Messenger. As Tor Messenger is no longer developed, we can remove this host.
If removing build-sunet-b
gives us some resources that we can use elsewhere, I think it would be useful to add them to build-sunet-a.torproject.net
(which we use for building Tor Browser).