I prefer to delete not maintained oracle packaging files and leave only `README.md` file.
Sounds like a valid solution - if the position of the project is that RPM builds should be based on `pkg/kamailio/obs` instead of any of the `pkg/kamailio/oracle` files, I can work with that.
I'm currently building RPMs for my use based on the oracle file, and as it has a few problems, I keep patching it locally for each release - which is getting tedious. I'll update my packaging to use the `obs` file and will submit patches as relevant (and I'll make sure to write comments as required, next time).