Issue #3442763 by smustgrave: Remove deprecated code in RandomGeneratorTrait.php

    return Random::string($length);

  }

  /**

   * Callback for random string validation.

   *

   * @see \Drupal\Component\Utility\Random::string()

   *

   * @param string $string

   *   The random string to validate.

   *

   * @return bool

   *   TRUE if the random string is valid, FALSE if not.

   *

   * @deprecated in drupal:10.2.0 and is removed from drupal:11.0.0.

   *   Use \Drupal\TestTools\Random::stringValidate() instead.

   *

   * @see https://www.drupal.org/node/3358389

   */

  public function randomStringValidate($string) {

    @trigger_error(__METHOD__ . "() is deprecated in drupal:10.2.0 and is removed from drupal:11.0.0. Use \Drupal\TestTools\Random::stringValidate() instead. See https://www.drupal.org/node/3358389", E_USER_DEPRECATED);

    return Random::stringValidate($string);

  }

  /**

   * Generates a unique random string containing letters and numbers.

   *