rm gitlab ci file

.gitlab-ci.yml

-image: intelpython/intelpython3_full:latest
-
-pages:
-  stage: deploy
-  before_script:
-    - conda install -c conda-forge pandoc
-  script:
-    - python --version
-    - python -m pip install -r requirements.txt
-    - pip list
-    - conda list
-    - python -m sphinx -b html doc/ public
-  artifacts:
-    paths:
-      - public
-  only:
-    - master
-