public void removeUserFeaturesProvider(UserFeaturesProvider provider) {
        if ( provider == null )
        {
            throw new NullPointerException( "Argument 'provider' cannot be null." );
        }
        registeredUserFeatureProviders.remove( provider );
    }
Removes this provider of user features.

@param provider The provider of features.
xmppserver/src/main/java/org/jivesoftware/openfire/disco/IQDiscoInfoHandler.java