Code commented out

[Catarina-Alves]

snfeatures_test.py has much code commented out. I propose to either delete it or uncomment it.

[rbiswas4]

In this module, most of the code that is commented out can be removed. But it would be good if we can get this part of the test working, rather than removing it:

#   err=compare_images('tsne_plot_test.png', 'tsne_plot_truth.png', tol=1.e-3)

 #   if err:
 #       raise ImageComparisonFailure(err)

I believe @rlschuhmann wrote that code, and what it does is check that the new plot matches the old plot to some level of tolerance. (I think it would be nice to keep this kind of code somewhere. I suspect that in this instance the problem is that tsne plots are not deterministic, so this is failing, but I wonder if there is something like a random seed or state. @rlschuhmann ?