remove dead code

python/langsmith/_internal/_serde.py

@@ -31,16 +31,8 @@ def _simple_default(obj):
         # https://github.com/ijl/orjson#serialize
         if isinstance(obj, datetime.datetime):
             return obj.isoformat()
-        if isinstance(obj, uuid.UUID):
+        elif isinstance(obj, uuid.UUID):
             return str(obj)
-        if isinstance(obj, dict):
-            return {_simple_default(key): value for key, value in obj.items()}
-        if hasattr(obj, "model_dump") and callable(obj.model_dump):
-            return obj.model_dump(mode="json")
-        elif hasattr(obj, "dict") and callable(obj.dict):
-            return obj.dict()
-        elif hasattr(obj, "_asdict") and callable(obj._asdict):
-            return obj._asdict()
         elif isinstance(obj, BaseException):
             return {"error": type(obj).__name__, "message": str(obj)}
         elif isinstance(obj, (set, frozenset, collections.deque)):
@@ -90,8 +82,8 @@ def _serialize_json(obj: Any) -> Any:
                 "model_dump",
                 {"exclude_none": True, "mode": "json"},
             ),  # Pydantic V2 with non-serializable fields
-            ("to_dict", {}),  # dataclasses-json
             ("dict", {}),  # Pydantic V1 with non-serializable field
+            ("to_dict", {}),  # dataclasses-json
         ]
         for attr, kwargs in serialization_methods:
             if (