pydata/pandas — pull request #6930 by TomAugspurger (2014-04-22 18:33:03+00:00)
Title: API/DEPR: Deprecate order kwarg in factorize

Closes https://github.com/pydata/pandas/issues/6926

`order` wasn't being used at all.

I couldn't use the deprecate_kwarg decorator since the kwarg is being removed, not changed.