remove non-functional binder from Learning

pages/learning_MDAnalysis.md

@@ -24,14 +24,6 @@ site.docs.quickstart.url }}) when you are new MDAnalysis.
 
 Then browse the [{{ site.docs.userguide.name }}]({{ site.docs.userguide.url }}), which contains detailed documentation for all the important parts of MDAnalysis and many self-contained tutorials.
 
-[Interactive Jupyter
-notebooks](http://nbviewer.jupyter.org/github/MDAnalysis/binder-notebook/tree/master/notebooks/)
-show how to accomplish specific tasks (including visualizing
-trajectories with [nglview](http://nglviewer.org/nglview/latest/));
-these notebooks can be run in the cloud on Binder (click the "launch
-binder" button to start a notebook server).
-
-[![Binder](https://mybinder.org/badge.svg)](https://mybinder.org/v2/gh/MDAnalysis/binder-notebook/master?filepath=notebooks)
 
 There are a number of [older tutorials]({{site.github.wiki}}/Tutorials) available, too, although we recommend new users start  with [{{ site.docs.quickstart.name }}]({{
 site.docs.quickstart.url }}) and then start reading the [{{ site.docs.userguide.name }}]({{ site.docs.userguide.url }}).