[issue41490] Update bundled pip to 20.2.1 and setuptools to 49.2.1

[Jason R. Coombs]

Jason R. Coombs <jaraco at jaraco.com> added the comment:

> Why do we keep setuptools?

I agree; would be good to remove it if possible.

There are many packages that fail to build without Setuptools being present or --use-pep517 indicated. It would be nice if pip could make --use-pep517 the default, update that in Python, and then remove Setuptools. I would expect that approach will cause a great deal less turmoil in the ecosystem.

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