public static void deleteLocalProperty(String subdomain, String name) {
        MUCServiceProperties properties = propertyMaps.get(subdomain);
        if (properties == null) {
            properties = new MUCServiceProperties(subdomain);
        }
        properties.localRemove(name);
        propertyMaps.put(subdomain, properties);
    }
Deletes a Jive property. If the property doesn't exist, the method
does nothing. All children of the property will be deleted as well.

@param subdomain the subdomain of the service to delete a property from
@param name the name of the property to delete.
xmppserver/src/main/java/org/jivesoftware/openfire/muc/spi/MUCPersistenceManager.java