Remove pipenv-setup in order to publish PEP 625 compliant sdist and wheel

[samdoran]

pipenv-setup depends on an older version of packaging which creates sdist and wheel files that do not comply with PEP 625. This results in the following notice from PyPI:

This email is notifying you of an upcoming deprecation that we have determined may affect you as a result of your recent upload to 'koku-nise'.
In the future, PyPI will require all newly uploaded source distribution filenames to comply with PEP 625. Any source distributions already uploaded will remain in place as-is and do not need to be updated.
Specifically, your recent upload of 'koku-nise-4.7.2.tar.gz' is incompatible with PEP 625 because it does not contain the normalized project name 'koku_nise'.
In most cases, this can be resolved by upgrading the version of your build tooling to a later version that supports PEP 625 and produces compliant filenames. You do not need to remove the file.

pipenv-setup seems abandoned as the last commit was almost three years ago.

Pipfile and setup.py serve different purposes. Keeping them in sync shouldn't necessarily be a goal. Pipfile.lock serves developers working on nise. setup.py requirements serve those installing the application for use.

Steps to duplicate the problem

> python3 -m pip install --force setuptools wheel twine chardet pipenv-setup vistir==0.6.1 -c requirements/build-constraints.txt
> python setup.py sdist bdist_wheel
> ls -1 dist
koku-nise-4.7.2.tar.gz
koku_nise-4.7.2-py3-none-any.whl

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.7%. Comparing base (5aea935) to head (0e9492a).

Additional details and impacted files

@@          Coverage Diff          @@
##            main    #541   +/-   ##
=====================================
  Coverage   93.7%   93.7%           
=====================================
  Files         62      62           
  Lines       4663    4663           
  Branches     646     646           
=====================================
  Hits        4368    4368           
  Misses       158     158           
  Partials     137     137           

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[samdoran]

This is obsoleted by #537 but may be a useful stopgap measure until #537 is merged.