Now that dbctl is fully deployed, and sectionLoads/groupLoadsBySection information canonically lives there, it's time to remove those keys from the traditional location of db-$DC.php, as they are no longer being maintained by DBAs, and the information there will quickly grow stale and inaccurate.
However, this means that we'll have to either accept that https://noc.wikimedia.org/db.php will no longer display the data of which hosts have what loads in each section, or we'll have to find a way for them to access the data from etcd.
First question is: does db.php have known users that require this information?