[docs] packaging documentation should be removed

[Zbigniew Jędrzejewski-Szmek]

Hi,

docs.python.org/dev still carries documentation for packaging, despite the package
having been removed. http://docs.python.org/dev/library/packaging.html has
"3.3.0a4 Documentation" in the footer, so I presume that the page is a leftover.
Google returns results which point to the obsolete page, which is misleading.

Thanks,
Zbyszek