[#79] Entities: Remove EF proxies

Elwig/Windows/DeliveryScheduleAdminWindow.xaml.cs

@@ -47,8 +47,6 @@ namespace Elwig.Windows {
                 var (_, deliveryScheduleQuery, filter) = await vm.GetFilters(ctx);
                 var deliverySchedules = await deliveryScheduleQuery
                     .Include(s => s.Varieties)
-                    .Include(s => s.Branch)
-                    .AsSplitQuery()
                     .ToListAsync();
 
                 if (filter.Count > 0 && deliverySchedules.Count > 0) {