diff -r 892fc9e0c8df -r 4b6d3d0a853e selectors.py
--- a/selectors.py	Wed Mar 27 15:03:14 2013 +0100
+++ b/selectors.py	Wed Mar 27 14:49:12 2013 +0100
@@ -35,8 +35,6 @@
 EClassSelector = class_renamed('EClassSelector', EClassPredicate)
 EntitySelector = class_renamed('EntitySelector', EntityPredicate)
 
-# XXX pre 3.7? bw compat
-
 
 class on_transition(is_in_state):
     """Return 1 if entity is in one of the transitions given as argument list