removed tox.ini - obsolete - related to jpy_canvas, now removed

tox.ini

@@ -103,18 +103,6 @@ commands =
     # need to enable redis (in a container) in github workflow for this to work
     #    notebooks/test_service.ipynb
 
-[testenv:start_jupyter]
-# TODO: What is this for?  I think we could delete it. Jeremy.
-base_python = python3.10
-deps =
-    -r requirements-dev.txt
-commands =
-    python -m jupyter nbextension install --py --sys-prefix widgetsnbextension
-    python -m jupyter nbextension enable --py --sys-prefix widgetsnbextension
-    python -m jupyter nbextension install --py --sys-prefix jpy_canvas
-    python -m jupyter nbextension enable --py --sys-prefix jpy_canvas
-    python -m jupyter notebook
-
 [testenv:build]
 base_python = python3.10
 skip_install = true