[MIG] hr_timesheet_sheet: Use @api.ondelete() instead of unlink() to guard sheet

Author: aurelien-tempo

hr_timesheet_sheet/models/hr_timesheet_sheet.py

@@ -524,7 +524,8 @@ def write(self, vals):
                     rec.delete_empty_lines(True)
         return res
 
-    def unlink(self):
+    @api.ondelete(at_uninstall=False)
+    def _unlink_except_state_confirm_or_done(self):
         for sheet in self:
             if sheet.state in ("confirm", "done"):
                 raise UserError(
@@ -534,7 +535,6 @@ def unlink(self):
                         sheet.complete_name,
                     )
                 )
-        return super().unlink()
 
     def onchange(self, values, field_name, field_onchange):
         """