journal_data: Drop obsolete origin_visit fields
Related to T2310
Related to swh-model!275 (closed)
Test Plan
tox
Migrated from D3376 (view on Phabricator)
Staging instance, all changes can be removed at any time
Related to T2310
Related to swh-model!275 (closed)
tox
Migrated from D3376 (view on Phabricator)