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/cli/src/chain_spec.rs

@@ -295,10 +295,7 @@ pub fn testnet_genesis(
 	const STASH: Balance = ENDOWMENT / 1000;
 
 	GenesisConfig {
-		system: SystemConfig {
-			code: wasm_binary_unwrap().to_vec(),
-			changes_trie_config: Default::default(),
-		},
+		system: SystemConfig { code: wasm_binary_unwrap().to_vec() },
 		balances: BalancesConfig {
 			balances: endowed_accounts.iter().cloned().map(|x| (x, ENDOWMENT)).collect(),
 		},

substrate/bin/node/cli/src/service.rs

@@ -338,7 +338,6 @@ pub fn new_full_base(
 			transaction_pool: transaction_pool.clone(),
 			spawn_handle: task_manager.spawn_handle(),
 			import_queue,
-			on_demand: None,
 			block_announce_validator_builder: None,
 			warp_sync: Some(warp_sync),
 		})?;
@@ -369,8 +368,6 @@ pub fn new_full_base(
 		rpc_extensions_builder: Box::new(rpc_extensions_builder),
 		transaction_pool: transaction_pool.clone(),
 		task_manager: &mut task_manager,
-		on_demand: None,
-		remote_blockchain: None,
 		system_rpc_tx,
 		telemetry: telemetry.as_mut(),
 	})?;
@@ -542,7 +539,7 @@ mod tests {
 	use sc_service_test::TestNetNode;
 	use sc_transaction_pool_api::{ChainEvent, MaintainedTransactionPool};
 	use sp_consensus::{BlockOrigin, Environment, Proposer};
-	use sp_core::{crypto::Pair as CryptoPair, Public, H256};
+	use sp_core::{crypto::Pair as CryptoPair, Public};
 	use sp_inherents::InherentDataProvider;
 	use sp_keyring::AccountKeyring;
 	use sp_keystore::{SyncCryptoStore, SyncCryptoStorePtr};
@@ -621,7 +618,7 @@ mod tests {
 					None,
 				);
 
-				let mut digest = Digest::<H256>::default();
+				let mut digest = Digest::default();
 
 				// even though there's only one authority some slots might be empty,
 				// so we must keep trying the next slots until we can claim one.