DEPR: deprecate/remove pandas.tools.describe

[jreback]

This is really superfluous as .describe is much more comprehensive.

It is only a very brief mention in the docs, only a single test (for a single dtype), and not implemented generically.

https://github.com/pydata/pandas/blob/master/pandas/tools/describe.py

[jreback]

@jorisvandenbossche ?

[jorisvandenbossche]

Seems ok for me, also no use of it in the pandas tag on SO