Merge pull request #14506 from basebandit/JUJU-1674_remove_nw_cloud_d…

…isplay_python_test

#14506

This PR removes the old [cloud_display](https://github.com/juju/juju/blob/2.9/acceptancetests/assess_cloud_display.py) python tests which are now replaced by the new bash based counterpart [here](#14455)

## Checklist

- [x] Code style: imports ordered, good names, simple structure, etc
- [x] Comments saying why design decisions were made
- ~[ ] Go unit tests, with comments saying what you're testing~
- [x] [Integration tests](https://github.com/juju/juju/tree/develop/tests), with comments saying what you're testing
- ~[ ] [doc.go](https://discourse.charmhub.io/t/readme-in-packages/451) added or updated in changed packages~

## QA steps

Not needed.