Single ParachainBlockImport instance (#1782)

cumulus/parachain-template/node/src/command.rs

@@ -217,7 +217,6 @@ pub fn run() -> Result<()> {
 					let partials = new_partial(&config)?;
 					let db = partials.backend.expose_db();
 					let storage = partials.backend.expose_storage();
-
 					cmd.run(config, partials.client.clone(), db, storage)
 				}),
 				BenchmarkCmd::Machine(cmd) =>