Jupyterlab binder example broken

[MarcSkovMadsen]

Click the Jupyterlab example

This will open https://mybinder.org/v2/gh/finos/perspective/master?urlpath=lab/tree/examples/jupyter-notebooks

Jupyter command `jupyter-serverextension` not found.

[texodus]

This was unfortunately too much of an ongoing maintenance headache to support, so we've removed this example from the repo. We've got plans to replace it with something more permanent!