diff --git a/Lib/fontParts/base/layer.py b/Lib/fontParts/base/layer.py
index beaeb41f..6b008105 100644
--- a/Lib/fontParts/base/layer.py
+++ b/Lib/fontParts/base/layer.py
@@ -7,10 +7,8 @@
     Callable,
     Iterator,
     List,
-    NoReturn,
     Optional,
     Tuple,
-    TypeVar,
 )
 import collections