Fixed bug with new number of group on not current week

Schedule ICTIS/Main/Views/Sheets/CreateEditClassView.swift

@@ -185,16 +185,6 @@ struct CreateEditClassView: View {
             .background(Color("background"))
         }
     }
-    func delete(_ _class: ClassModel) throws {
-        let context = provider.viewContext
-        let existingClass = try context.existingObject(with: _class.objectID)
-        context.delete(existingClass)
-        Task (priority: .background) {
-            try await context.perform {
-                try context.save()
-            }
-        }
-    }
 }
 
 #Preview {