Finish removal of CO_GENERATOR_ALLOWED.
diff --git a/Misc/NEWS b/Misc/NEWS
index 6738809..4e16038 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -12,6 +12,9 @@
 Core and builtins
 -----------------
 
+- CO_GENERATOR_ALLOWED is no longer defined, this behavior is the default.
+  The name was removed from Include/code.h.
+
 - PEP 308: conditional expressions were added (x if cond else y).
 
 - Patch 1433928: