diff --git a/pydantic/main.py b/pydantic/main.py
index 9648bffb436..a25e96efeaa 100644
--- a/pydantic/main.py
+++ b/pydantic/main.py
@@ -127,18 +127,6 @@ def hash_function(self_: Any) -> int:
 _is_base_model_class_defined = False
 
 
-_T = TypeVar('_T')
-
-
-def __dataclass_transform__(
-    *,
-    eq_default: bool = True,
-    order_default: bool = False,
-    kw_only_default: bool = False,
-    field_descriptors: Tuple[Union[type, Callable[..., Any]], ...] = (()),
-) -> Callable[[_T], _T]:
-    return lambda a: a
-
 @__dataclass_transform__(kw_only_default=True, field_descriptors=(Field, FieldInfo))
 class ModelMetaclass(ABCMeta):
     @no_type_check  # noqa C901