Remove packaging from the standard library.

Distutils2 will live on on PyPI and be included in the stdlib when it
is ready.  See discussion starting at
http://mail.python.org/pipermail/python-dev/2012-June/120430.html
diff --git a/setup.py b/setup.py
index 538cf58..19ab24e 100644
--- a/setup.py
+++ b/setup.py
@@ -2063,8 +2063,7 @@
           # check the PyBuildScripts command above, and change the links
           # created by the bininstall target in Makefile.pre.in
           scripts = ["Tools/scripts/pydoc3", "Tools/scripts/idle3",
-                     "Tools/scripts/2to3", "Tools/scripts/pysetup3",
-                     "Tools/scripts/pyvenv"]
+                     "Tools/scripts/2to3", "Tools/scripts/pyvenv"]
         )
 
 # --install-platlib