With the refactor in version 99, the credential_vault_library_deleted
table was renamed to credential_vault_generic_library_deleted, but its
corresponding purge job was not removed from the job table, leading to
an error: "job credential_vault_library_deleted_items_table_purge not
registered on scheduler".
This commit deletes the legacy job entry. The new job that takes over
the legacy one is
credential_vault_generic_library_deleted_items_table_purge.