Revert "buildservice: enable gitlab CI"
This reverts commit 7df67be0.
There is no tox in this repo, it doesn't make sense to use tox here. We'll need to figure out how to run linters for k8s resources.
Bug: T325189 Bug: T327057 Signed-off-by: Arturo Borrero Gonzalez aborrero@wikimedia.org