net: parameterize the removing client from nc list This change is used in later commits so we can avoid the removal of the netclient if it is delayed. No functional change intended. Reviewed-by: Si-Wei Liu <si-wei.liu@oracle.com> Acked-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Eugenio Pérez <eperezma@redhat.com> Signed-off-by: Jason Wang <jasowang@redhat.com>