Since commit <60d9ad6f> we require
GnuTLS and since commit <ac0d21c7>
we can actually drop the usage of WITH_GNUTLS.
Signed-off-by: NPavel Hrdina <phrdina@redhat.com>
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>