Remove modular Database

[Roudenn]

Durk made me do this (database is getting refactored upstream probably anyways)

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[github-actions]

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[github-actions]

This pull request has been automatically marked as stale because it has not had
any activity for 14 days. It will be closed in another 14 days if no further activity occurs.
Thank you for your contributions.

You can always ask for help on our development discord.

If you'd like to keep this open, just leave any comment, and the stale label will be removed.