public boolean removeUserInterceptor(String username, PacketInterceptor interceptor) {
        boolean answer = false;
        List<PacketInterceptor> userInterceptors = usersInterceptors.get(username);
        if (userInterceptors != null) {
            answer = userInterceptors.remove(interceptor);
            // Remove the entry for this username if the list is now empty
            if (userInterceptors.isEmpty()) {
                usersInterceptors.remove(username);
            }
        }
        return answer;
    }
Removes the interceptor from the list of interceptors that are related to a specific
username.

@param username the name of the user.
@param interceptor the interceptor to remove.
@return true if the item was present in the list
xmppserver/src/main/java/org/jivesoftware/openfire/interceptor/InterceptorManager.java