[FIX] fixup: unlink -> ondelete

Author: nd-dew

addons/mail/models/discuss/discuss_call_history.py

@@ -27,9 +27,9 @@ class DiscussCallHistory(models.Model):
     )
     _channel_id_end_dt_idx = models.Index("(channel_id, end_dt) WHERE end_dt IS NULL")
 
-    def unlink(self):
+    @api.ondelete(at_uninstall=False)
+    def _unlink_cleanup_artifacts_attachments(self):
         self.artifact_ids.unlink()
-        return super().unlink()
 
     @api.depends("start_dt", "end_dt")
     def _compute_duration_hour(self):