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

[sea212]

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

Occurrences:

zeitgeist/primitives/src/math/fixed.rs

Lines 333 to 334 in b958393

	// TODO(#1328): Remove after rustc nightly-2024-04-22
	#![allow(clippy::duplicated_attributes)]

zeitgeist/primitives/src/math/root.rs

Lines 159 to 160 in b958393

	// TODO(#1328): Remove after rustc nightly-2024-04-22
	#![allow(clippy::duplicated_attributes)]

zeitgeist/zrml/neo-swaps/src/math.rs

Lines 508 to 509 in b958393

	// TODO(#1328): Remove after rustc nightly-2024-04-22
	#![allow(clippy::duplicated_attributes)]

zeitgeist/zrml/swaps/src/tests.rs

Lines 27 to 28 in b958393

	// TODO(#1328): Remove after rustc nightly-2024-04-22
	#![allow(clippy::duplicated_attributes)]

[saboonikhil]

The required changes can be implemented only after #1331 is realised on main.