Modifies $ReasonType as a @var string

Author: alexxmattei

MangoPay/PayOutPaymentRef.php

@@ -14,12 +14,4 @@ class PayOutPaymentRef extends Libraries\Dto
      * @var string
      */
     public $referenceId;
-}
-
-/**
- * Reason for PayOut
- */
-class PayoutReasonType
-{
-    const PayInRefund = 'PAYIN_REFUND';
 }