The csync_wizard does not have an unconfigure option to stop a system from being a master
server. To disable a master server, simply stop cfservd:
To prevent cfservd from starting
at system startup, edit /etc/rc.config.d/cfservd and change CSYNC_CONFIGURED to "0".
If the csync_wizard was used
to create the cfengine configuration and add managed clients, it can
be used to remove managed clients. Run the wizard on the master server
and select the "Remove a client" option. The wizard
requires that non-interactive ssh access to the
managed client has been configured as described in the section “Using the Wizard to Configure a Synchronization Client”. The specified
client will be deleted from cfrun.hosts, its
public key deleted from the master ppkeys directory,
and the master’s key deleted from the client’s ppkeys directory.