removed Reference param from Refund

Author: Iulian Masar

src/main/java/com/mangopay/entities/Refund.java

@@ -43,9 +43,6 @@ public class Refund extends Transaction {
     @SerializedName("RefundReason")
     private RefundReason refundReason;
 
-    @SerializedName("Reference")
-    private String reference;
-
     @SerializedName("StatementDescriptor")
     private String statementDescriptor;
 
@@ -89,14 +86,6 @@ public void setRefundReason(com.mangopay.core.RefundReason refundReason) {
         this.refundReason = refundReason;
     }
 
-    public String getReference() {
-        return reference;
-    }
-
-    public void setReference(String reference) {
-        this.reference = reference;
-    }
-
     public String getStatementDescriptor() {
         return statementDescriptor;
     }

src/test/java/com/mangopay/core/BaseTest.java

@@ -1253,7 +1253,6 @@ protected Refund getNewRefundForPayIn(PayIn payIn) throws Exception {
         refund.setFees(new Money());
         refund.getFees().setAmount(payIn.getFees().getAmount());
         refund.getFees().setCurrency(payIn.getFees().getCurrency());
-        refund.setReference("Reference");
 
         return this.api.getPayInApi().createRefund(payIn.getId(), refund);
     }