Delete .gitlab-ci.yml

.gitlab-ci.yml

-image: docker:latest
-
-services:
-  - docker:dind
-
-stages:
-  - build
-  - test
-
-build:
-  stage: build
-  script:
-    - docker-compose build
-
-sast:
-  stage: test
-  image: registry.gitlab.com/gitlab-org/security-products/sast:latest
-  dependencies:
-    - build
-  script:
-    - docker-compose up -d
-    - /app/bin/run -o /code/output gl-sast --format=gl-container --debug --fail-on=high,unknown
-
-  after_script:
-    - docker-compose down