Patch to remove builtins dropped from 3.x

[A.M. Kuchling]

Python 3.0 dropped a number of built-in functions. Using the list from Python 3.1's code, this patch removes the built-ins that no longer need to be supported.

Still to do: add new built-ins; make docstrings match 3.1's docstrings. I'll try to do that eventually, but won't be able to do so any time soon.

[isop (isop)]

Committed - thanks! :)