diff --git a/src/plone/restapi/serializer/vocabularies.py b/src/plone/restapi/serializer/vocabularies.py
index 6d88ad240d..620fa29aa5 100644
--- a/src/plone/restapi/serializer/vocabularies.py
+++ b/src/plone/restapi/serializer/vocabularies.py
@@ -11,8 +11,6 @@
 from zope.schema.interfaces import ITokenizedTerm
 from zope.schema.interfaces import IVocabulary
 
-import warnings
-
 
 @implementer(ISerializeToJson)
 class SerializeVocabLikeToJson: