Respect `clippy::unused-trait-names` when auto-importing traits

[edwloef]

IMO, Traits should be auto-imported as _ if https://rust-lang.github.io/rust-clippy/master/index.html#unused_trait_names is enabled and I'm not actively trying to import the trait name. I'm not entirely sure whether changing behavior depending on clippy configuration is in scope, though, or whether this behavior is better implemented on the editor side of things.

[ChayimFriedman2]

We don't have access to Clippy config. We can however provide a setting.

[edwloef]

Oh, yeah that makes much more sense in this context 😆

[Veykril]

I assume this is about importing completions? Given that the assist already allows you to pick which form you want

[edwloef]

Yes, it is.