cartopy
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Chart Server dependency
Google chart server has been deprecated in 2012, and the notification for turning it down was in 2019:
https://groups.google.com/g/google-chart-api/c/rZtHTyYgyXI
The servers can be gone at any moment at this point.
These cartopy tests still seem to rely on the chart server API:
https://github.com/SciTools/cartopy/blob/da6a8c521f614abea4d16e659b3c87ec80025a66/lib/cartopy/tests/test_img_tiles.py#L39
Could we remove the chartserver dependencies? What is the best path forward? How deep does cartopy depend on the chart server API?
It is, AFAICT, only used for testing in that file.