virt-admin.pod: Remove a statement about remote access to the daemon
    
    There's been a forgotten fragment (copy-paste error probably) in the
    virt-admin's man page referring the reader to our web page on how to construct
    URIs in case of remote access, which sort of implies that we support it which
    we don't at the moment, so better remove that.
    
    Signed-off-by: Erik Skultety <eskultet@redhat.com>