The incremental lister is not really ready [1](P438).
It's not really necessary either (as the phabricator instances out there are not that big [2])
so clean up:
- scheduler db incremental task [3]
- swh-site's scheduler configuration
- swh-lister's code (if it's not used/tested, it's dead code so might as well remove it, less churn in understanding for new people, less maintenance and all that)
[1] P438
[2] T1801#33696
[3]
14:16:50 softwareheritage-scheduler@belvedere:5432=> delete from task_run where task in (select id from task where type = 'list-phabricator-incremental'); DELETE 5 Time: 12.546 ms 14:17:01 softwareheritage-scheduler@belvedere:5432=> delete from task where type = 'list-phabricator-incremental'; DELETE 5 Time: 9.527 ms 14:17:14 softwareheritage-scheduler@belvedere:5432=> delete from task_type where type='list-phabricator-incremental'; DELETE 1