slapos_accounting: source project is not required on Payment Transaction

Customer can buy Virtual MAster

master/bt5/slapos_accounting/PortalTypePropertySheetTemplateItem/property_sheet_list.xml

@@ -39,7 +39,6 @@
  </portal_type>
  <portal_type id="Payment Transaction">
   <item>SlapOSLedgerConstraint</item>
-  <item>SlapOSVirtualMasterSourceProjectConstraint</item>
  </portal_type>
  <portal_type id="Purchase Invoice Transaction">
   <item>SlapOSLedgerConstraint</item>

master/bt5/slapos_accounting/bt/template_portal_type_property_sheet_list

@@ -17,7 +17,6 @@ Open Sale Order | SlapOSAccountingOpenSaleOrderConstraint
 Open Sale Order | SlapOSLedgerConstraint
 Open Sale Order | SlapOSVirtualMasterSourceProjectConstraint
 Payment Transaction | SlapOSLedgerConstraint
-Payment Transaction | SlapOSVirtualMasterSourceProjectConstraint
 Purchase Invoice Transaction | SlapOSLedgerConstraint
 Purchase Invoice Transaction | SlapOSVirtualMasterSourceProjectConstraint
 Sale Invoice Transaction | SlapOSAccountingSaleInvoiceTransactionConstraint