Code review comment for lp:~suligap/canonical-identity-provider/charm-de-oops

If I remember correctly we need multiple MP to remove a config in a "safe" way.

1) remove the usage in templates and charm code, but keep it in config.yaml

2) land and deploy the changes from (1)

3) remove the config entries from local.yaml and mojo spec deployer configs

4) land that change

5) remove configs from config.yaml

Might be exploding the thing a bit too much and some steps could be merged, need to double check the mojo spec and CI to be sure