chore: drop Python 3.11 support

Removes Python 3.11 from CI matrix, publish_pypi workflow, tox envlist,
and setup.py classifiers.

Part of openedx/public-engineering#499

Author: feanil

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        python-version: ['3.11', '3.12']
+        python-version: ['3.12']
         toxenv: [quality, docs, django42, django52]
 
     steps:

.github/workflows/publish_pypi.yml

@@ -16,7 +16,7 @@ jobs:
        - name: setup python
          uses: actions/setup-python@v5
          with:
-           python-version: 3.11
+           python-version: 3.12
 
        - name: Install pip
          run: pip install -r requirements/pip.txt

setup.py

@@ -152,7 +152,6 @@ def is_requirement(line):
         'License :: OSI Approved :: Apache Software License',
         'Natural Language :: English',
         'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.11',
         'Programming Language :: Python :: 3.12',
         'Framework :: Django :: 4.2',
         'Framework :: Django :: 5.2',

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py{311,312}-celery{53}-django{42,52},quality,docs
+envlist = py{312}-celery{53}-django{42,52},quality,docs
 
 [doc8]
 ignore = D001