diff --git a/sale_allow_group_shipments_with_different_dates.diff b/sale_allow_group_shipments_with_different_dates.diff
deleted file mode 100644
index 7739269..0000000
--- a/sale_allow_group_shipments_with_different_dates.diff
+++ /dev/null
@@ -1,12 +0,0 @@
-Index: mai/modules/sale_shipment_grouping/sale.py
-===================================================================
---- a/trytond/trytond/modules/sale_shipment_grouping/sale.py
-+++ b/trytond/trytond/modules/sale_shipment_grouping/sale.py
-@@ -32,7 +32,6 @@ class Sale(metaclass=PoolMeta):
-             ('moves.origin', 'like', 'sale.line,%'),
-             ('state', 'in', ['draft', 'waiting']),
-             ]
--        shipment_domain += self._get_grouped_shipment_planned_date(shipment)
-         defaults = Shipment.default_get(self._shipment_grouping_fields,
-             with_rec_name=False)
-         for field in self._shipment_grouping_fields: