Cutting down on python versions

[Joshua Root]

On 2015-1-24 07:22 , Jeremy Lavergne wrote:
> Joshua pointed it out in a previous thread: we don't make use of other
> package managers (Pip in this instance), so we shouldn't have their
> packages in MacPorts unless they have requisites in MacPorts.

The opposite is equally important; i.e. something else in MacPorts
requires the module.

I wouldn't bother purging all the modules that don't pass this test, but
I would encourage considering it before adding new ones.

- Josh