diff --git a/spacy/_ml.py b/spacy/_ml.py
index 23facb9fb..62e0ceb9a 100644
--- a/spacy/_ml.py
+++ b/spacy/_ml.py
@@ -743,5 +743,3 @@ def concatenate_lists(*layers, **kwargs): # pragma: no cover
         return ys, concatenate_lists_bwd
     model = wrap(concatenate_lists_fwd, concat)
     return model
-
-