Remove pkinit-anonymous command
    
    Ever since from v4.5, FreeIPA expects at least some kind of
    anonymous PKINIT to work. The pkinit-anonymous command was supposed
    to enable/disable anonymous pkinit by locking/unlocking the
    anonymous principal. We can't allow this for FreeIPA to work
    so we are removing the command as it was never supported anyway.
    
    https://pagure.io/freeipa/issue/6936
    
    Reviewed-By: Martin Babinsky <mbabinsk@redhat.com>