Doc: Fix the array.fromfile method doc (GH-22037)

The check about the f argument type was removed in this commit:
https://github.com/python/cpython/commit/2c94aa567e525c82041ad68a3174d8c3acbf37e2

Thanks for Pedro Arthur Duarte (pedroarthur.jedi at gmail.com) by the help with
this bug.