Remove obsolete docker-in-docker CI tags

.gitlab-ci.yml

@@ -2,7 +2,6 @@ include: "https://git.autistici.org/pipelines/containers/raw/master/common.yml"
 
 test:
   stage: container-test
-  tags: [docker-in-docker]
   image: registry.git.autistici.org/pipelines/images/test/python-chromedriver:master
   services:
     - name: "${IMAGE_TAG}"
@@ -31,7 +30,6 @@ ctest:
 
 a11y:
   stage: container-test
-  tags: [docker-in-docker]
   image: registry.gitlab.com/gitlab-org/ci-cd/accessibility:5.3.0-gitlab.3
   services:
     - name: "${IMAGE_TAG}"