fixed clippy errror
@@ -17,7 +17,7 @@ use sp_api::impl_runtime_apis;
use sp_authority_discovery::AuthorityId as AuthorityDiscoveryId;
use sp_core::{
crypto::KeyTypeId,
- u32_trait::{_2, _3, _4},
+ u32_trait::{_2, _4},
OpaqueMetadata,
};
use sp_runtime::traits::{
