Delete deprecated file

.gitlab-industrial-ci.yml

-image: docker:git
-
-variables:
-  TMPDIR: "${CI_PROJECT_DIR}.tmp"
-
-services:
-  - docker:dind
-
-stages:
-  - build
-
-before_script:
-  - apk add --update bash coreutils tar wget
-  - git clone https://github.com/ros-industrial/industrial_ci.git .ci_config
-
-industrial_ci_kinetic:
-  stage: build
-  script: .ci_config/gitlab.sh
-  variables:
-    ROS_DISTRO: kinetic
-    ROS_PARALLEL_JOBS: "-j1" # keep this for now, since there seems to be memory limit issues in the ci VM