There is no api to do that now. You don't want to do a force non-aop remove (e.g., remove(fqn, root)) since it doesn't remove the CacheInterceptor. You will need to do rmeoveObject individually.
If you want, please go to jira.jboss.com, open a feature request for JBoss Cache, and assign it to me. I'll put it in the roadmap.
I added a new JIRA entry as proposed by Ben (JBCACHE-104).