CLN: Collapse private ._take implementation into the public take method

[mroeschke]

xref #27171 (comment)

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.

pandas/pandas/core/generic.py

Line 3322 in 527e714

def _take(self, indices, axis=0, is_copy=True):