Disable the pylint CI test until upstream's bug is fixed

See https://github.com/PyCQA/pylint/issues/2439

.gitlab-ci.yml

@@ -74,19 +74,6 @@ pytest-latest:
     - python3 setup.py install
     - py.test -v test/
 
-pylint-latest:
-  stage: test
-  image: python:3
-  script:
-    - apt-get update && apt-get install -y libidn11-dev
-    - git clone git://git.louiz.org/slixmpp
-    - pip3 install pylint pyasn1-modules cffi --upgrade
-    - cd slixmpp
-    - python3 setup.py install
-    - cd ..
-    - python3 setup.py install
-    - pylint -E poezio
-
 pylint-plugins:
   stage: test
   image: python:3