Remove tox, recommend uv

tox has been popular in times when it was easier to run a full Python
test matrix on your workstation, for example supported by `pyenv`,
compared to provisioning and maintaining it on a Jenkins CI runner.

Nowadays, it became so easy to run the full-version test matrix on
GitHub Actions (GHA), so `tox` became obsolete in such environments
that heavily use GHA. Now that recent advancements added `uv` to the
table, sandbox environments don't need to feel ousted.

Author: amotl

DEVELOP.rst

@@ -5,7 +5,7 @@ CrateDB Python developer guide
 Setup
 =====
 
-Optionally install Python package and project manager ``uv``,
+Optionally install Python package and project manager `uv`_,
 in order to significantly speed up the package installation::
 
     {apt,brew,pip,zypper} install uv
@@ -67,16 +67,10 @@ To inspect the whole list of test cases, run::
 
     bin/test --list-tests
 
-You can run the tests against multiple Python interpreters with `tox`_::
-
-    tox
-
-To do this, you will need the respective Python interpreter versions available
-on your ``$PATH``.
-
-To run against a single interpreter, you can also invoke::
-
-    tox -e py37
+The CI setup on GitHub Actions (GHA) provides a full test matrix covering
+relevant Python versions. You can invoke the software tests against a specific
+Python interpreter on your workstation using `uv`_, by supplying the
+`UV_PYTHON`_ environment variable prior to invoking ``source bootstrap.sh``.
 
 *Note*: Before running the tests, make sure to stop all CrateDB instances which
 are listening on the default CrateDB transport port to avoid side effects with
@@ -172,8 +166,9 @@ nothing special you need to do to get the live docs to update.
 .. _ReStructuredText: http://docutils.sourceforge.net/rst.html
 .. _Sphinx: http://sphinx-doc.org/
 .. _tests/assets/pki/*.pem: https://github.com/crate/crate-python/tree/main/tests/assets/pki
-.. _tox: http://testrun.org/tox/latest/
 .. _twine: https://pypi.python.org/pypi/twine
 .. _useful command-line options for zope-testrunner: https://pypi.org/project/zope.testrunner/#some-useful-command-line-options-to-get-you-started
+.. _uv: https://docs.astral.sh/uv/
+.. _UV_PYTHON: https://docs.astral.sh/uv/configuration/environment/#uv_python
 .. _versions hosted on ReadTheDocs: https://readthedocs.org/projects/crate-python/versions/
 .. _zope.testrunner: https://pypi.org/project/zope.testrunner/

setup.py

@@ -70,7 +70,6 @@ def read(path):
             "poethepoet<0.33",
             "ruff<0.10",
             "stopit>=1.1.2,<2",
-            "tox>=3,<5",
             "pytz",
             "zc.customdoctests>=1.0.1,<2",
             "zope.testing>=4,<6",