Removed Caltech's course

docs/source/useful_links.rst

@@ -149,7 +149,6 @@ Machine Learning
 - `AstroML <http://www.astroml.org/>`_
 - `AstroML Book <https://press.princeton.edu/titles/10159.html>`_ or on `Amazon <https://www.amazon.com/Statistics-Mining-Machine-Learning-Astronomy/dp/0691151687>`_
 - `Machine Learning Course <https://www.coursera.org/learn/machine-learning/>`_ by Andrew Ng (Stanford)
-- `Caltech-JPL Summer School on Big Data Analytics <https://www.coursera.org/course/bigdataschool>`_ course
 - `Victor Lavrenko's playlist <https://www.youtube.com/user/victorlavrenko/playlists>`_ on machine learning tutorials
 - `Introductory Applied Machine Learning <http://www.inf.ed.ac.uk/teaching/courses/iaml/>`_
 - `Udacity's Deep Learning course <https://www.udacity.com/course/deep-learning--ud730>`_