Update .gitlab-ci.yml

.gitlab-ci.yml

@@ -20,8 +20,6 @@ variables:
   CONTAINER_IMAGE: docker.infra.flowdat.com/fd3/installer
   DOCKER_USER: drone
   DOCKER_PWD: 6hd2dLfL
-  DOCKER_HOST: tcp://docker:2375
-  DOCKER_DRIVER: overlay2
 
 docker:
   stage: build