We started getting this deprecation warning but I don't know what to do with it. Is there somewhere in your documentation that would explain this more? Thanks! Example log: https://github.com/astropy/astropy/runs/6838665326?check_suite_focus=true

matplotlib._api.deprecation.MatplotlibDeprecationWarning: The checkdep_usetex function
was deprecated in Matplotlib 3.6 and will be removed two minor releases later.
Use Vendor the code instead.

We use it like this:

 TEX_UNAVAILABLE = not matplotlib.checkdep_usetex(True)

Hard to tell from the traceback where this is coming from inside matplotlib because the warning went through a generic matplotlib/_api/deprecation.py.