Kill the light client, CHTs and change tries. (#10080)

* Remove light client, change tries and CHTs

* Update tests

* fmt

* Restore changes_root

* Fixed benches

* Cargo fmt

* fmt

* fmt

substrate/bin/node/rpc/src/lib.rs

@@ -51,18 +51,6 @@ use sp_consensus::SelectChain;
 use sp_consensus_babe::BabeApi;
 use sp_keystore::SyncCryptoStorePtr;
 
-/// Light client extra dependencies.
-pub struct LightDeps<C, F, P> {
-	/// The client instance to use.
-	pub client: Arc<C>,
-	/// Transaction pool instance.
-	pub pool: Arc<P>,
-	/// Remote access to the blockchain (async).
-	pub remote_blockchain: Arc<dyn sc_client_api::light::RemoteBlockchain<Block>>,
-	/// Fetcher instance.
-	pub fetcher: Arc<F>,
-}
-
 /// Extra dependencies for BABE.
 pub struct BabeDeps {
 	/// BABE protocol config.
@@ -183,26 +171,3 @@ where
 
 	Ok(io)
 }
-
-/// Instantiate all Light RPC extensions.
-pub fn create_light<C, P, M, F>(deps: LightDeps<C, F, P>) -> jsonrpc_core::IoHandler<M>
-where
-	C: sp_blockchain::HeaderBackend<Block>,
-	C: Send + Sync + 'static,
-	F: sc_client_api::light::Fetcher<Block> + 'static,
-	P: TransactionPool + 'static,
-	M: jsonrpc_core::Metadata + Default,
-{
-	use substrate_frame_rpc_system::{LightSystem, SystemApi};
-
-	let LightDeps { client, pool, remote_blockchain, fetcher } = deps;
-	let mut io = jsonrpc_core::IoHandler::default();
-	io.extend_with(SystemApi::<Hash, AccountId, Index>::to_delegate(LightSystem::new(
-		client,
-		remote_blockchain,
-		fetcher,
-		pool,
-	)));
-
-	io
-}