/**
  * Public function that deletes a list from the account
  *
  * @param object $list - a valid list object with a valid lists link
  * @return string $code - returns success or fail code from API server
  */
 public function deleteList($list)
 {
     $utility = new CTCTUtility();
     $call = $utility->getApiPath() . $list->getLink();
     $return = $utility->httpDelete($call);
     $code = $return['info']['http_code'];
     return code;
 }