remove install of old markdown parser

build-docs.sh

-pip install sphinx_rtd_theme myst-parser sphinxcontrib-jquery
+pip install sphinx_rtd_theme sphinxcontrib-jquery
 
 cd docs || exit 1
 sphinx-build source build

docs/.gitlab-ci.yml

@@ -7,7 +7,7 @@ build-documentation:
   image: sphinxdoc/sphinx:latest
 
   before_script:
-    - pip install sphinx_rtd_theme sphinx-autodoc2 myst-parser
+    - pip install sphinx_rtd_theme sphinxcontrib-jquery
     - cd $CI_PROJECT_DIR/docs/source
   script:
     - make html