Rust-clippy: `use_self` lint false positives

[stanislav-tkach]

Minimal example:

trait IntoBytes {
    fn into_bytes(&self) -> Vec<u8>;
}

impl IntoBytes for u8 {
    fn into_bytes(&self) -> Vec<u8> {
        vec![*self]
    }
}

Here u8 in the trait definition is used as byte, but Clippy suggest to replace u8 with Self which is confusing. I think that this lint shouldn't be triggered for trait implementation.

[oli-obk]

Whoops. You're right we should only suggest Self if it was Self in the trait declaration.