Remove unused import

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

polkadot-parachain/src/command.rs

@@ -32,10 +32,7 @@ use sc_cli::{
 	ChainSpec, CliConfiguration, DefaultConfigurationValues, ImportParams, KeystoreParams,
 	NetworkParams, Result, RuntimeVersion, SharedParams, SubstrateCli,
 };
-use sc_service::{
-	config::{BasePath, PrometheusConfig},
-	TaskManager,
-};
+use sc_service::config::{BasePath, PrometheusConfig};
 use sp_core::hexdisplay::HexDisplay;
 use sp_runtime::traits::{AccountIdConversion, Block as BlockT};
 use std::{net::SocketAddr, path::PathBuf};