The removeServerFromCoreGroup parameter deletes the specified server from the DefaultCoreGroup. This command modifies the coregroup.xml located in the <ND_install_root>/config/cells/<cell_name>/coregroups/DefaultCoreGroup directory.
--s <server name> Specifies server to remove from the core group,
formatted like this: <cell>/<node>/<server>
./wpfadmin removeServerFromCoreGroup --s wpfsample3Network/wpfsample2/nodeagent
[root@wpfsample3 bin]# ./wpfadmin removeServerFromCoreGroup --s wpfsample3Network/wpfsample2/nodeagent WASX7209I: Connected to process "Deployment Manager" on node wpfsample3Manager using SOAP connector; The type of process is: DeploymentManager WPFC0065I: Server set to wpfsample3Network/wpfsample2/nodeagent WPFC0068I: Server wpfsample2\nodeagent has been removed from DefaultCoreGroup