CLN: Collapse private ._take implementation into the public take method
xref https://github.com/pandas-dev/pandas/pull/27171#issuecomment-507505074

An internal `._take` method was created to process a keyword argument deprecation.
Now that both `._take` and `.take` have the same signature, the code within `._take` can be collapsed into the public `.take` method.

https://github.com/pandas-dev/pandas/blob/527e714647a16ad31f80ea535af5a63156515861/pandas/core/generic.py#L3322