Issue #3532489 by alexpott, neptune-dc: Remove unused properties from DateTimePlus

   */

  const RFC7231 = 'D, d M Y H:i:s \G\M\T';

  /**

   * An array of possible date parts.

   *

   * @var string[]

   */

  protected static $dateParts = [

    'year',

    'month',

    'day',

    'hour',

    'minute',

    'second',

  ];

  /**

   * The value of the time value passed to the constructor.

   *

   * @var string

   */

  protected $inputTimeRaw = '';

  /**

   * The prepared time, without timezone, for this date.

   *

   * @var string

   */

  protected $inputTimeAdjusted = '';

  /**

   * The value of the timezone passed to the constructor.

   *

   * @var string

   */

  protected $inputTimeZoneRaw = '';

  /**

   * The prepared timezone object used to construct this date.

   *

   * @var string

   */

  protected $inputTimeZoneAdjusted = '';

  /**

   * The value of the format passed to the constructor.

   *

   * @var string

   */

  protected $inputFormatRaw = '';

  /**

   * The prepared format, if provided.

   *

   * @var string

   */

  protected $inputFormatAdjusted = '';

  /**

   * The value of the language code passed to the constructor.

   *