code: public function remove($cookie, $removeFromBrowser = true)
      {
          if ($this->readOnly) {
              throw new InvalidCallException('The cookie collection is read only.');
          }
          if ($cookie instanceof Cookie) {
              $cookie->expire = 1;
              $cookie->value = '';
          } else {
              $cookie = Yii::createObject([
                  'class' => 'yii\web\Cookie',
                  'name' => $cookie,
                  'expire' => 1,
              ]);
          }
          if ($removeFromBrowser) {
              $this->_cookies[$cookie->name] = $cookie;
          } else {
              unset($this->_cookies[$cookie->name]);
          }
      }
docs: Removes a cookie.
  If `$removeFromBrowser` is true, the cookie will be removed from the browser.
  In this case, a cookie with outdated expiry will be added to the collection.
  @param Cookie|string $cookie the cookie object or the name of the cookie to be removed.
  @param bool $removeFromBrowser whether to remove the cookie from browser
  @throws InvalidCallException if the cookie collection is read only