Removing six.py from package breaks other packages

[Joshua Kugler]

There is this patch added to the python3-urllib3 package:
```
From: Daniele Tricoli <email address hidden>
Date: Thu, 8 Oct 2015 13:19:46 -0700
Subject: Do not use embedded copy of python-six.

Forwarded: not-needed

Patch-Name: 01_do-not-use-embedded-python-six.patch
```
This removes six.py from /usr/lib/python3/dist-packages/urllib3/packages/. However, other packages reply on six.py being there, such as https://github.com/dopstar/requests-ntlm2/. Removing six.py breaks those packages, resulting in tracebacks like:

```
$ python3 -c 'from requests_ntlm2 import HttpNtlmAuth'
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/local/lib/python3.8/dist-packages/requests_ntlm2/__init__.py", line 1, in <module>
    from .adapters import HttpNtlmAdapter, HttpProxyAdapter
  File "/usr/local/lib/python3.8/dist-packages/requests_ntlm2/adapters.py", line 10, in <module>
    from .connection import HTTPConnection as _HTTPConnection
  File "/usr/local/lib/python3.8/dist-packages/requests_ntlm2/connection.py", line 9, in <module>
    from requests.packages.urllib3.packages.six.moves.http_client import (
ModuleNotFoundError: No module named 'requests.packages.urllib3.packages.six
```

If the file is not put back, at least having a symlink there would be nice.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: python3-urllib3 1.25.8-2
Uname: Linux 5.7.0-050700-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.9
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: KDE
Date: Mon Sep 28 13:57:21 2020
InstallationDate: Installed on 2018-04-20 (892 days ago)
InstallationMedia: Kubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215)
PackageArchitecture: all
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: python-urllib3
UpgradeStatus: Upgraded to focal on 2020-09-04 (23 days ago)

[Launchpad Janitor (janitor)]

This bug was fixed in the package python-urllib3 - 2.0.7-1

---------------
python-urllib3 (2.0.7-1) experimental; urgency=medium

  [ Stefano Rivera ]
  * New upstream release.
  * Drop six patch and dependency on python3-six, superseded upstream.
    (Closes: #1025218, LP: #1897633)
  * Drop bundled backports.makefile from copyright, removed upstream.
  * Build with pybuild pyproject plugin.
  * Mark Build-Depends with nocheck.
  * Re-enable the full test suite.
  * Patch: Handle ConnectionRefusedError in test.requires_network()
  * Patch: Mark tests that require network
  * Patch: Don't make requests to evil.com in tests.
  * Export CI=1 in tests, to increase timeouts.
  * Allow stderr in the autopkgtest.
  * Patch: Skip expensive integration tests, that often cause timeouts.

 -- Daniele Tricoli <email address hidden> Sun, 12 Nov 2023 23:57:09 +0100