Remove `#[allow(clippy::duplicated_attributes)]` after rustc nightly-2024-04-22 or later

[sea212]

See https://github.com/rust-lang/rust-clippy/issues/12537. Currently we can't use that rustc version or later, because it results in errors.

Occurrences: https://github.com/zeitgeistpm/zeitgeist/blob/b95839337a90000eb65da78f2186a30321a2c19a/primitives/src/math/fixed.rs#L333-L334 https://github.com/zeitgeistpm/zeitgeist/blob/b95839337a90000eb65da78f2186a30321a2c19a/primitives/src/math/root.rs#L159-L160 https://github.com/zeitgeistpm/zeitgeist/blob/b95839337a90000eb65da78f2186a30321a2c19a/zrml/neo-swaps/src/math.rs#L508-L509 https://github.com/zeitgeistpm/zeitgeist/blob/b95839337a90000eb65da78f2186a30321a2c19a/zrml/swaps/src/tests.rs#L27-L28