Fixed a few warnings (#4841)

substrate/client/cli/src/node_key.rs

@@ -91,9 +91,10 @@ where
 	net_config_dir.as_ref().map(|d| d.as_ref().join(name))
 }
 
+#[cfg(test)]
 mod tests {
-	use super::*;
 	use sc_network::config::identity::ed25519;
+	use super::*;
 
 	#[test]
 	fn tests_node_name_good() {

substrate/client/network/src/behaviour.rs

@@ -25,7 +25,7 @@ use libp2p::core::{Multiaddr, PeerId, PublicKey};
 use libp2p::kad::record;
 use libp2p::swarm::{NetworkBehaviourAction, NetworkBehaviourEventProcess};
 use libp2p::core::{nodes::Substream, muxing::StreamMuxerBox};
-use log::{debug, warn};
+use log::debug;
 use sp_consensus::{BlockOrigin, import_queue::{IncomingBlock, Origin}};
 use sp_runtime::{traits::{Block as BlockT, NumberFor}, Justification};
 use std::{iter, task::Context, task::Poll};