diff --git a/src/eko/io/types.py b/src/eko/io/types.py
index bdd038586..95b43596a 100644
--- a/src/eko/io/types.py
+++ b/src/eko/io/types.py
@@ -7,8 +7,6 @@
 
 from .dictlike import DictLike
 
-T = typing.TypeVar("T")
-
 # Energy scales
 # -------------