remote: remove obsolete & incorrect comment from libvirtd.conf

The libvirtd.conf file has a comment pointing people to format.html
which has nothing todo with the configuration file format.

It also has a comment about tests/daemon-conf which no longer exists,
and even if it did exist such comment is not relevant to end users
when this file is installed in /etc/.
Reviewed-by: NMichal Privoznik <mprivozn@redhat.com>
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>

src/remote/libvirtd.conf

 # Master libvirt daemon configuration file
 #
-# For further information consult https://libvirt.org/format.html
-#
-# NOTE: the tests/daemon-conf regression test script requires
-# that each "PARAMETER = VALUE" line in this file have the parameter
-# name just after a leading "#".
 
 #################################################################
 #