Suppression d'un .all() inutile.

bda/views.py

@@ -239,7 +239,7 @@ def do_tirage(request, tirage_id):
         if False:
             Attribution.objects.filter(
                     spectacle__tirage=tirage_elt
-                ).all().delete()
+                ).delete()
             for (show, members, _) in results:
                 for (member, _, _, _) in members:
                     attrib = Attribution(spectacle=show, participant=member)