diff --git a/src/event.py b/src/event.py
index e3e009e80..d6f2e69de 100644
--- a/src/event.py
+++ b/src/event.py
@@ -11,7 +11,7 @@
 whenever they are modified.
 """
 from __future__ import annotations
-from typing import Generator, TypeVar, Any, Type, Generic, Callable, Awaitable
+from typing import Generator, TypeVar, Any, Generic, Callable, Awaitable
 from typing_extensions import ParamSpec
 
 from contextlib import contextmanager
@@ -28,7 +28,6 @@
 ArgT = ParamSpec('ArgT')
 ValueT = TypeVar('ValueT')
 ValueT_co = TypeVar('ValueT_co', covariant=True)
-NoneType: Type[None] = type(None)
 
 
 @attrs.define(init=False, eq=False)