diff --git a/node/Cargo.toml b/node/Cargo.toml
index 1d840cbb..76b1a130 100644
--- a/node/Cargo.toml
+++ b/node/Cargo.toml
@@ -32,10 +32,7 @@ cumulus-client-network                  = { git = "https://github.com/paritytech
 cumulus-client-service                  = { git = "https://github.com/paritytech/cumulus.git", branch = "polkadot-v0.9.36" }
 cumulus-primitives-core                 = { git = "https://github.com/paritytech/cumulus.git", branch = "polkadot-v0.9.36" }
 cumulus-primitives-parachain-inherent   = { git = "https://github.com/paritytech/cumulus.git", branch = "polkadot-v0.9.36" }
-cumulus-relay-chain-inprocess-interface = { git = "https://github.com/paritytech/cumulus.git", branch = "polkadot-v0.9.36" }
 cumulus-relay-chain-interface           = { git = "https://github.com/paritytech/cumulus.git", branch = "polkadot-v0.9.36" }
-cumulus-relay-chain-rpc-interface       = { git = "https://github.com/paritytech/cumulus.git", branch = "polkadot-v0.9.36" }
-cumulus-relay-chain-minimal-node        = { git = "https://github.com/paritytech/cumulus.git", branch = "polkadot-v0.9.36" }
 
 # darwinia
 crab-runtime     = { path = "../runtime/crab" }
diff --git a/node/src/command.rs b/node/src/command.rs
index acd4be45..6962f2c6 100644
--- a/node/src/command.rs
+++ b/node/src/command.rs
@@ -568,7 +568,7 @@ pub fn run() -> Result<()> {
 					if config.role.is_authority() { "yes" } else { "no" }
 				);
 
-				if collator_options.relay_chain_rpc_url.is_some() && cli.relay_chain_args.len() > 0 {
+				if !collator_options.relay_chain_rpc_urls.is_empty() && cli.relay_chain_args.len() > 0 {
 					log::warn!("Detected relay chain node arguments together with --relay-chain-rpc-url. This command starts a minimal Polkadot node that only uses a network-related subset of all relay chain CLI options.");
 				}
 
diff --git a/node/src/service/mod.rs b/node/src/service/mod.rs
index 7dbad4fc..8c9aa0ad 100644
--- a/node/src/service/mod.rs
+++ b/node/src/service/mod.rs
@@ -216,35 +216,6 @@ where
 	})
 }
 
-async fn build_relay_chain_interface(
-	polkadot_config: sc_service::Configuration,
-	parachain_config: &sc_service::Configuration,
-	telemetry_worker_handle: Option<sc_telemetry::TelemetryWorkerHandle>,
-	task_manager: &mut sc_service::TaskManager,
-	collator_options: cumulus_client_cli::CollatorOptions,
-	hwbench: Option<sc_sysinfo::HwBench>,
-) -> cumulus_relay_chain_interface::RelayChainResult<(
-	Arc<(dyn 'static + cumulus_relay_chain_interface::RelayChainInterface)>,
-	Option<polkadot_service::CollatorPair>,
-)> {
-	match collator_options.relay_chain_rpc_url {
-		Some(relay_chain_url) =>
-			cumulus_relay_chain_minimal_node::build_minimal_relay_chain_node(
-				polkadot_config,
-				task_manager,
-				relay_chain_url,
-			)
-			.await,
-		None => cumulus_relay_chain_inprocess_interface::build_inprocess_relay_chain(
-			polkadot_config,
-			parachain_config,
-			telemetry_worker_handle,
-			task_manager,
-			hwbench,
-		),
-	}
-}
-
 /// Start a node with the given parachain `Configuration` and relay chain `Configuration`.
 ///
 /// This is the actual implementation that is abstract over the executor and the runtime api.