Do not require kombu dev

celery/security/__init__.py

@@ -9,7 +9,6 @@
 from __future__ import absolute_import
 from __future__ import with_statement
 
-from kombu import disable_insecure_serializers
 from kombu.serialization import registry
 
 from celery import current_app
@@ -36,7 +35,8 @@ Please see the configuration reference for more information.
 
 
 def disable_untrusted_serializers(whitelist=None):
-    disable_insecure_serializers(whitelist)
+    for name in set(registry._decoders) - set(whitelist or []):
+        registry.disable(name)whitelist)
 
 
 def setup_security(allowed_serializers=None, key=None, cert=None, store=None,