@Override
    public Set<String> getAvailableQueryAttributes(final PersonAttributeDaoFilter filter) {
        return cachedPersonAttributesDao.getAvailableQueryAttributes(filter);
    }
Remove user attributes multivalued seed.

@param seed the seed
support/cas-server-support-person-directory-core/src/main/java/org/apereo/cas/persondir/cache/CachingPersonAttributeDaoImpl.java