Remove the rest of the notebooks.ai related resources.

Author: Julian

DEMO.ipynb

@@ -1,7 +1,6 @@
 [tox]
 envlist =
     py{36,37,38,py3}-{noextra,format,format_nongpl}-{build,tests},
-    demo
     readme
     safety
     secrets
@@ -43,11 +42,6 @@ deps =
 deps = bandit
 commands = {envbindir}/bandit --recursive {toxinidir}/jsonschema
 
-[testenv:demo]
-deps = jupyter
-commands =
-    {envbindir}/jupyter nbconvert --output-dir {envtmpdir} {toxinidir}/DEMO.ipynb
-
 [testenv:readme]
 deps =
     docutils