Close #16022: What's New in Python 3.3 document is no more at beta stage

Doc/whatsnew/3.3.rst

@@ -48,10 +48,6 @@
 
 This article explains the new features in Python 3.3, compared to 3.2.
 
-.. note:: Beta users should be aware that this document is currently in
-   draft form. It will be updated substantially as Python 3.3 moves towards
-   release, so it's worth checking back even after reading earlier versions.
-
 
 Summary -- Release highlights
 =============================