Replace ProvenanceDB.remove_cache by a dict of Set
instead of a dict of dict, which was actually used as a set.
Depends in !18 (closed)
Migrated from D5774 (view on Phabricator)
instead of a dict of dict, which was actually used as a set.
Depends in !18 (closed)
Migrated from D5774 (view on Phabricator)