Revert "Mark CI job for image deployments with environment"

This reverts commit 1124de7.

We actually do not yet push to Docker Hub,
and this is the place where we would need the token.

Author: PhilippWendler

.gitlab-ci.yml

@@ -242,7 +242,6 @@ reuse:
     - mkdir -p /root/.docker
     - echo "{\"auths\":{\"$CI_REGISTRY\":{\"username\":\"$CI_REGISTRY_USER\",\"password\":\"$CI_REGISTRY_PASSWORD\"}}}" > /kaniko/.docker/config.json
     - /kaniko/executor --dockerfile $CI_PROJECT_DIR/$DOCKERFILE --destination $CI_REGISTRY_IMAGE/$IMAGE
-  environment: deploy/docker
   only:
     - schedules
     - web