diff --git a/hugr-py/src/hugr/serialization/ops.py b/hugr-py/src/hugr/serialization/ops.py
index 6f075f2cf..8ec8dcdab 100644
--- a/hugr-py/src/hugr/serialization/ops.py
+++ b/hugr-py/src/hugr/serialization/ops.py
@@ -209,11 +209,6 @@ def insert_port_types(self, in_types: TypeRow, out_types: TypeRow) -> None:
         assert len(in_types) == 0
         self.types = list(out_types)
 
-    # class Config:
-    #     json_schema_extra = {
-    #         "required": ["op", "parent", "types"]
-    #     }
-
 
 class Output(DataflowOp):
     """An output node. The inputs are the outputs of the function."""