CI: remove obsolete config

.gitlab-ci.yml

@@ -21,9 +21,6 @@ variables:
   image:
     name: gcr.io/kaniko-project/executor:debug-v0.16.0
     entrypoint: [""]
-  artifacts:
-    untracked: true
-    expire_in: 1 hour
   before_script:
     - mkdir -p /kaniko/.docker
     - echo "{\"auths\":{\"$CI_REGISTRY\":{\"username\":\"$CI_REGISTRY_USER\",\"password\":\"$CI_REGISTRY_PASSWORD\"}}}" > /kaniko/.docker/config.json