Dependency updates round 1

[matthewhughes934]

First round of upstreaming some improvements, mostly around
dependencies, from https://github.com/matthewhughes934/isort-fork

• Remove some flake8 exceptions

  Mostly as a matter of consistency. For isort/__init__.py this
  exception looks to not be needed since
  be0fbd0

  An exception is kept in pace for an example file in tests as the
  contents of the file are just for testing.

• Restore setuptools as optional dependency

  This looks to have been accidentally removed with
  f7a6b0e, setuptools is still required
  in isort.setuptools_commands

• Drop some unused dependencies

  • ipython was removed with 49b41a5
  • smmap2 looking at the history with git log -G smmap --name-only --oneline suggests this was only ever defined in
    poetry.lock/pyproject.toml. Given this is a library and not
    providing something extra like e.g. a flake8 plugin it should be
    safe to remove

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.12%. Comparing base (7e50570) to head (e53ab0f).
Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2325   +/-   ##
=======================================
  Coverage   99.12%   99.12%           
=======================================
  Files          39       39           
  Lines        3094     3095    +1     
  Branches      787      787           
=======================================
+ Hits         3067     3068    +1     
  Misses         15       15           
  Partials       12       12           

[DanielNoord]

@matthewhughes934 This can be rebased on main again :) Sorry for the churn! Just taking things slow.

[matthewhughes934]

@matthewhughes934 This can be rebased on main again :) Sorry for the churn! Just taking things slow.

👍 no worries, I've just rebased ✅

[DanielNoord]

Awesome, thanks!