bundle2: don't check for whether we can do stream clones
At the moment this isn't used and all stream clones use the legacy protocol.
In an upcoming diff, canperformstreamclone will print out a message if a stream
clone was requested but couldn't happen for some reason. Removing this call
ensures the message isn't printed twice.
[paths]
/ = /var/hg/repos/*
[web]
allow_push = *
push_ssl = False