Remove GitLab CI

.gitlab-ci.yml

@@ -1,10 +0,0 @@
-variables:
-  GIT_DEPTH: "1"
-  GIT_SUBMODULE_STRATEGY: "recursive"
-
-build:docker:
-  image: docker
-  services:
-    - docker:dind
-  script:
-    - docker build .