After files are removed from the new repo, in the attributes folder, remove dedicated, microshift, and servicebinding. We only need common attributes. In this directory, only keep the items we need, which looks like the common attributes file. In the common attributes file, we only need the items relevant for our product.
https://github.com/openshift/openshift-docs/tree/build-docs/_attributes

NOTE: double-check where the ROSA attributes are. I believe they might be in a separate file from common attributes. Mentioning so we don't forget to look. (It might be there is no action, just mentioning while I think of it.)