Remove unused line in discriminator

Author: dbanty

openapi_python_client/schema/openapi_schema_pydantic/reference.py

@@ -1,7 +1,6 @@
 from typing import Annotated, Any, Literal, TypeVar, Union
 
 from pydantic import BaseModel, ConfigDict, Discriminator, Field, Tag
-from pydantic_core import ArgsKwargs
 from typing_extensions import TypeAlias
 
 
@@ -36,8 +35,6 @@ class Reference(BaseModel):
 def _reference_discriminator(obj: Any) -> Literal["ref", "other"]:
     if isinstance(obj, dict):
         return "ref" if "$ref" in obj else "other"
-    if isinstance(obj, ArgsKwargs):
-        return "ref" if obj.kwargs and "ref" in obj.kwargs else "other"
     return "ref" if isinstance(obj, Reference) else "other"