Remove `derive_more` from dependencies

[pkhry]

closes #1503

[jsdw]

We've had this sort of thing before, and yeah I'd be up for having some CI check that the TOML formatting is ok (+ a thing to run to make it ok), just to avoid any disagreements on what the format should be etc once it's set up :)

[pkhry]

Would be easier to review if you could omit the TOML fmt changes, I guess you are using some fmt tool for that.

dropped formatting changes until we setup the autoformatting tool