Remove inclusion of redundant service
We already build within docker:28-dind.
Please note that git.rz.uni-jena.de is deprecated and will be disabled on October 1. Please update your repo URLs if git.rz.uni-jena.de is still used.
You can check it with "git remote -v" for each repo, and change it with "git remote set-url origin git.uni-jena.de", if necessary.
We already build within docker:28-dind.