Removed CI/CD

.gitlab-ci.yml

-cache:
-  paths:
-    - ./site
-
-stages:
-  - build
-  - deploy
-
-build-docs:
-  stage: build
-  script:
-    - make build-docs
-
-deploy-docs:
-  stage: deploy
-  needs:
-    - build-docs
-  only:
-    refs:
-      - master
-  script:
-    - make deploy-docs
-
-deploy-dockerhub-docs:
-  stage: deploy
-  needs:
-    - build-docs
-  only:
-    refs:
-      - master
-  script:
-    - DOCKER_USERNAME="${DOCKER_USERNAME}" DOCKER_PASSWORD="${DOCKER_PASSWORD}" make deploy-dockerhub-docs