- ``redbot-setup delete`` no longer errors about "unexpected keyword argument" (fix#2955)
- ``redbot-setup delete`` no longer prompts about backup when user passes ``--no-prompt`` option (fix#2956)
- ``--[no-]backup``, ``--[no-]drop-db`` and ``--[no-]remove-datapath`` in ``redbot-setup delete`` command are now on/off flags. ``--no-prompt`` was changed to flag too, but it doesn't have ``--prompt`` equivalent as there's no much point in having it
- ``redbot-setup`` now uses `click.confirm` for confirmation prompts and thy now also have default values for user convenience
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