Removing unused client code (#1645)

* moving ipc deriving to trait

* refactoring of the client

rpc/rpctest/src/main.rs

@@ -111,7 +111,7 @@ impl Configuration {
 			for b in &blockchain.blocks_rlp() {
 				let _ = client.import_block(b.clone());
 				client.flush_queue();
-				client.import_verified_blocks(&IoChannel::disconnected());
+				client.import_verified_blocks();
 			}
 			let sync = Arc::new(TestSyncProvider::new(SyncConfig {
 				protocol_version: 65,