@Override
public void removeConcept(String conceptId) throws ClassifierException {
SolrServer solrServer = getActiveSolrServer();
try {
solrServer.deleteByQuery(conceptUriField + ":" + ClientUtils.escapeQueryChars(conceptId));
solrServer.commit();
} catch (Exception e) {
String msg = String.format("Error removing topic with id '%s' on Solr Core '%s'", conceptId,
solrCoreId);
throw new ClassifierException(msg, e);