[Python-3000] Removing email package until it's fixed

[Bill Janssen]

> FWIW, I'm very much against moving email out of the core. This has
> been discussed a number of times before, and as far as I am aware, no
> conclusion reached. However, the "batteries included" approach of
> Python is a huge benefit for me.

I agree.  But if the current code doesn't work with 3K, not sure what
else to do.  I guess it could just be labelled a "show-stopper" till
it's fixed.

Bill