diff --git a/nac3artiq/demo/demo.py b/nac3artiq/demo/demo.py
index 5a0de8c71..aa135757c 100644
--- a/nac3artiq/demo/demo.py
+++ b/nac3artiq/demo/demo.py
@@ -1,10 +1,4 @@
 from min_artiq import *
-from numpy import int32, int64
-
-
-@extern
-def output_int(x: int32):
-    ...
 
 
 @nac3