fix some stubs

django-stubs/forms/utils.pyi

@@ -1,6 +1,6 @@
 from collections import UserList
 from datetime import datetime
-from typing import Any, Callable, Dict, List, Optional, Tuple, Type, Union, Sequence
+from typing import Any, Dict, List, Optional, Sequence, Union
 
 from django.core.exceptions import ValidationError
 from django.utils.safestring import SafeText
@@ -28,9 +28,6 @@ class ErrorList(UserList):
     def as_json(self, escape_html: bool = ...) -> str: ...
     def as_ul(self) -> str: ...
     def as_text(self) -> str: ...
-    def __reduce_ex__(
-        self, *args: Any, **kwargs: Any
-    ) -> Tuple[Callable, Tuple[Type[ErrorList]], Dict[str, Union[List[ValidationError], str]], None, None]: ...
 
 def from_current_timezone(value: datetime) -> datetime: ...
 def to_current_timezone(value: datetime) -> datetime: ...