diff --git a/comfy/ops.py b/comfy/ops.py
index f6f85de60..f674b47f7 100644
--- a/comfy/ops.py
+++ b/comfy/ops.py
@@ -1,5 +1,4 @@
 import torch
-from contextlib import contextmanager
 import comfy.model_management
 
 def cast_bias_weight(s, input):