Remove DataScienceHandbook from our CI
It'll be broken by python3.6 move, needs
to be fixed before we can re-enable.
DELETE
tests/external/datasci.repos.yaml
-# A bunch of external datascience related repos we care about!
-- name: Jake's Data Science Book
- url: https://github.com/jakevdp/PythonDataScienceHandbook
- ref: de0cc6bd31
- verify: python -c 'import matplotlib'

Remove DataScienceHandbook from our CI

It'll be broken by python3.6 move, needs https://github.com/jakevdp/PythonDataScienceHandbook/issues/108
to be fixed before we can re-enable.