Remove workaround for nonexisting bug
Remove workaround for nonexisting bug

The workaround is for a bug that was fixed in Python 2.3.3, see e.g.
https://bugzilla.redhat.com/show_bug.cgi?id=88543
We only support Python 2.4+, anyway.

bluetib/netaddr,braaen/netaddr,jonathanwcrane/netaddr,mlecours/netaddr,sc68cal/netaddr