Removed distutils fallback

[claudep]

As of https://github.com/kennethreitz/setup.py/blob/master/setup.py

[chfw]

What if on some Linux distribution, setup tools is missing? On my project, someone proposed the opposite.

[claudep]

Then you won't be able to install this package anyway as several of its dependencies are also directly importing setuptools.setup without fallback. I think the time caring for a missing setuptools package is over now.

[chfw]

Here's the reference to the issue: moremoban/pypi-mobans#66.

The main concern is for embedded device environment and docker builds where size matters.

[claudep]

I see, however I'm afraid unless a PEP changes that, the current good practice is still to directly import setuptools.setup.
See https://docs.python.org/3/library/distutils.html which is some official endorsement of setuptools.

[chfw]

Thanks for further elaboration and we now understand both sides of the opinion. I have no objections for the merge.

[timofurrer]

Totally agree! Thanks 🎉