code: public Object deleteRequest(String restUrl, Map<String, String> params) throws IOException, WebServiceException {
  		return this.postRequest(HttpMethod.DELETE, restUrl, params);
  	}
docs: Do a DELETE HTTP request to the given REST-URL.
  
  @param restUrl
  REST URL.
  @param params
  Parameters for adding to the query string.
  @throws IOException
  if the request go bad.