WebDriver\Session::deleteCookie PHP Method

    public function deleteCookie($cookieName)
    {
        $this->curl('DELETE', '/cookie/' . $cookieName);
        return $this;
    }

 /**
  * Sets cookie.
  *
  * @param   string  $name
  * @param   string  $value
  */
 public function setCookie($name, $value = null)
 {
     if (null === $value) {
         $this->wdSession->deleteCookie($name);
         return;
     }
     $cookieArray = array('name' => $name, 'value' => (string) $value, 'secure' => false);
     $this->wdSession->setCookie($cookieArray);
 }