[MNT]: numdecs parameter in LogLocator

[rcomer]

Summary

LogLocator takes a parameter numdecs, which is not described in its docstring. I also can't find anywhere the parameter is used in the code.
https://matplotlib.org/devdocs/api/ticker_api.html#matplotlib.ticker.LogLocator

numdec (no s) is used within tick_values, but is calculated when needed

matplotlib/lib/matplotlib/ticker.py

Line 2322 in 61ed3f4

numdec = math.floor(log_vmax) - math.ceil(log_vmin)

Proposed fix

If numdecs really isn't used, maybe remove it. Otherwise describe it in the docstring.