Remove code from all dist_utils.py

[skiedude]

This if check was breaking the environment markers python_version in requirements.txt when installing/building the package through python setup.py ...

In st2common/requirements.txt the limitation imposed on

backports.zoneinfo[tzdata]; python_version<"3.9"

was being ignored because the if check was splitting on ; and only grabbing what was in front, thus removing this requirement that should be enforced.

This is causing a large majority if not all pack CI tests to fail because backports.zoneinfo is no longer needed in python 3.10
pganssle/zoneinfo#111
https://github.com/StackStorm-Exchange/stackstorm-vsphere/actions/runs/12839844866/job/35807686455

[nzlosh]

Great job on tracking this down. 👍

[skiedude]

My flake8 error I assume should be fixed by #6298 since the error results from ulrlib3 on python 3.8

virtualenv-st2client/bin/st2 --version
Traceback (most recent call last):
  File "virtualenv-st2client/bin/st2", line 33, in <module>
    sys.exit(load_entry_point('st2client==3.9.dev0', 'console_scripts', 'st2')())
  File "virtualenv-st2client/bin/st2", line 25, in importlib_load_entry_point
    return next(matches).load()
  File "/opt/hostedtoolcache/Python/3.8.10/x64/lib/python3.8/importlib/metadata.py", line 77, in load
    module = import_module(match.group('module'))
  File "/opt/hostedtoolcache/Python/3.8.10/x64/lib/python3.8/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 848, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/home/runner/work/st2/st2/virtualenv-st2client/lib/python3.8/site-packages/st2client-3.9.dev0-py3.8.egg/st2client/shell.py", line 42, in <module>
    from st2client import models
  File "/home/runner/work/st2/st2/virtualenv-st2client/lib/python3.8/site-packages/st2client-3.9.dev0-py3.8.egg/st2client/models/__init__.py", line 18, in <module>
    from st2client.models.core import *  # noqa
  File "/home/runner/work/st2/st2/virtualenv-st2client/lib/python3.8/site-packages/st2client-3.9.dev0-py3.8.egg/st2client/models/core.py", line 29, in <module>
    import requests
  File "/home/runner/work/st2/st2/virtualenv-st2client/lib/python3.8/site-packages/requests-2.32.3-py3.8.egg/requests/__init__.py", line 43, in <module>
    import urllib3
  File "/home/runner/work/st2/st2/virtualenv-st2client/lib/python3.8/site-packages/urllib3-2.3.0-py3.8.egg/urllib3/__init__.py", line 14, in <module>
    from . import exceptions
  File "/home/runner/work/st2/st2/virtualenv-st2client/lib/python3.8/site-packages/urllib3-2.3.0-py3.8.egg/urllib3/exceptions.py", line 26, in <module>
    _TYPE_REDUCE_RESULT = tuple[typing.Callable[..., object], tuple[object, ...]]
TypeError: 'type' object is not subscriptable
make: *** [Makefile:537: .st2client-install-check] Error 1
Script done, file is typescript

[skiedude]

The integration tests seems transient, seeing how they are all passing now with no changes.