Drop name db table and remove the data migration CRON job

[mbommerez]

Tasks

• [ ] Drop name db table
• [ ] Remove the running CRON job (ticket #1695) that migrates data to Durable Objects

Note

• The first task is already done - code is in #1686 - it needs splitting out into a new PR. And #1686 needs to be binned or reduced to not include the table drop.