`download_osmnx_graph` produces a deprecation warning for the `shapely` package

[user27182]

Describe what maintenance you would like added.

Running

pip install pyvista osmnx | python -c "from pyvista.examples.downloads import download_osmnx_graph; download_osmnx_graph()"

Gives a deprecation warning:

UserWarning: Unpickling a shapely <2.0 geometry object. Please save the pickle again; shapely 2.1 will not have this compatibility.
  return pickle.load(open(filename, 'rb'))

This dataset was originally added in #1611

cc @akaszynski

EDIT:
The maintenance to be done is perhaps to update the example? Or maybe add a note to the example about the shapely version requirements.

Link to the docs page for this example: link
Line generating the warning:

pyvista/pyvista/examples/downloads.py

Line 3932 in 3d6e327

 return pickle.load(open(filename, 'rb')) 

Note: This warning was found while running some tests locally as part of #5787

Links to source code.

No response

Pseudocode or Screenshots

No response

[Alex Kaszynski]

Let's drop this example. I think we already have a ton of dependencies in our examples, and we might consider separating out some of our extended examples into a separate repo.