Drop support of Python 3.11

.gitlab-ci.yml

@@ -2,15 +2,6 @@ stages:
   - test
   - quality-assurance
 
-py311:
-  stage: test
-  image: python:3.11-alpine
-  before_script:
-    - apk add --no-cache libmagic
-    - apk add --no-cache gettext
-    - pip install tox --no-cache-dir
-  script: tox -e py311
-
 py312:
   stage: test
   image: python:3.12-alpine

tox.ini

@@ -1,6 +1,5 @@
 [tox]
 envlist =
-    py311
     py312
     py313