Simplify trait bound

client/db/src/lib.rs

@@ -22,15 +22,14 @@ use std::sync::Arc;
 
 // Substrate
 pub use sc_client_db::DatabaseSource;
-use sp_blockchain::HeaderBackend;
 use sp_runtime::traits::Block as BlockT;
 
 pub mod kv;
 #[cfg(feature = "sql")]
 pub mod sql;
 
 #[derive(Clone)]
-pub enum Backend<Block: BlockT, C: HeaderBackend<Block>> {
+pub enum Backend<Block: BlockT, C> {
 	KeyValue(Arc<kv::Backend<Block, C>>),
 	#[cfg(feature = "sql")]
 	Sql(Arc<sql::Backend<Block>>),

client/mapping-sync/src/kv/worker.rs

@@ -59,9 +59,9 @@ pub struct MappingSyncWorker<Block: BlockT, C, BE> {
 		Arc<crate::EthereumBlockNotificationSinks<crate::EthereumBlockNotification<Block>>>,
 }
 
-impl<Block: BlockT, C: HeaderBackend<Block>, BE> Unpin for MappingSyncWorker<Block, C, BE> {}
+impl<Block: BlockT, C, BE> Unpin for MappingSyncWorker<Block, C, BE> {}
 
-impl<Block: BlockT, C: HeaderBackend<Block>, BE> MappingSyncWorker<Block, C, BE> {
+impl<Block: BlockT, C, BE> MappingSyncWorker<Block, C, BE> {
 	pub fn new(
 		import_notifications: ImportNotifications<Block>,
 		timeout: Duration,

template/node/src/rpc/mod.rs

@@ -27,7 +27,7 @@ mod eth;
 pub use self::eth::{create_eth, EthDeps};
 
 /// Full client dependencies.
-pub struct FullDeps<C: HeaderBackend<Block>, P, A: ChainApi, CT, CIDP> {
+pub struct FullDeps<C, P, A: ChainApi, CT, CIDP> {
 	/// The client instance to use.
 	pub client: Arc<C>,
 	/// Transaction pool instance.