These were introduced many years ago when ufuncs were buggy and
could return NotImplemented sometimes.  This has been fixed for
many years, though.

I suspect the errstate for `isfinite` is not required so removed it.
It was a 12+ year old work-around for warnings that really shouldn't
happen to begin with.  (The commit mentions `np.isinf(np.inf)` giving
a warning, which doesn't make sense, I think.)

MAINT: remove redundant open() modes and io.open() alias

ENH: add support for fujitsu C/C++ compiler and SSL2 to numpy.

[ci skip]

NumPy switched to using pytest in 2018 and nose has been unmaintained
for many years. We have kept NumPy's nose support to avoid breaking
downstream projects who might have been using it and not yet switched to
pytest or some other testing framework. With the arrival of Python 3.12,
unpatched nose will raise an error. It it time to move on.

Decorators removed

- raises
- slow
- setastest
- skipif
- knownfailif
- deprecated
- parametrize
- _needs_refcount

These are not to be confused with pytest versions with similar names,
e.g., pytest.mark.slow, pytest.mark.skipif, pytest.mark.parametrize.

Functions removed

- Tester
- import_nose
- run_module_suite

[skip actions] [skip travis] [skip azp]