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/test-utils/test-runner/src/client.rs

@@ -159,7 +159,6 @@ where
 			transaction_pool: transaction_pool.clone(),
 			spawn_handle: task_manager.spawn_handle(),
 			import_queue,
-			on_demand: None,
 			block_announce_validator_builder: None,
 			warp_sync: None,
 		};
@@ -195,14 +194,12 @@ where
 			backend: backend.clone(),
 			task_manager: &mut task_manager,
 			keystore: keystore.sync_keystore(),
-			on_demand: None,
 			transaction_pool: transaction_pool.clone(),
 			rpc_extensions_builder: Box::new(move |_, _| {
 				let mut io = jsonrpc_core::IoHandler::default();
 				io.extend_with(ManualSealApi::to_delegate(ManualSeal::new(rpc_sink.clone())));
 				Ok(io)
 			}),
-			remote_blockchain: None,
 			network,
 			system_rpc_tx,
 			telemetry: None,