code: public String doDelete(String url) throws IOException {
          HttpDelete httpDelete = new HttpDelete(getWsapiUrl() + url);
          return doRequest(httpDelete);
      }
docs: Perform a delete against the WSAPI
  
  @param url the request url
  @return the JSON encoded string response
  @throws IOException if a non-200 response code is returned or if some other
  problem occurs while executing the request