Relaxed clippy fixes/nits (#2661)

This PR contains just a few clippy fixes and nits, which are, however,
relaxed by workspace clippy settings here:
https://github.com/paritytech/polkadot-sdk/blob/master/Cargo.toml#L483-L506

---------

Co-authored-by: Dmitry Sinyavin <dmitry.sinyavin@parity.io>
Co-authored-by: ordian <write@reusable.software>
Co-authored-by: command-bot <>
Co-authored-by: Bastian Köcher <git@kchr.de>

substrate/frame/broker/src/lib.rs

@@ -42,9 +42,7 @@ pub use weights::WeightInfo;
 pub use adapt_price::*;
 pub use core_mask::*;
 pub use coretime_interface::*;
-pub use nonfungible_impl::*;
 pub use types::*;
-pub use utility_impls::*;
 
 #[frame_support::pallet]
 pub mod pallet {