Fix some new clippy lints

src/rpc/consul.rs

@@ -51,10 +51,8 @@ pub async fn get_consul_nodes(
 		let pubkey = ent
 			.node_meta
 			.get("pubkey")
-			.map(|k| hex::decode(&k).ok())
-			.flatten()
-			.map(|k| NodeID::from_slice(&k[..]))
-			.flatten();
+			.and_then(|k| hex::decode(&k).ok())
+			.and_then(|k| NodeID::from_slice(&k[..]));
 		if let (Some(ip), Some(pubkey)) = (ip, pubkey) {
 			ret.push((pubkey, SocketAddr::new(ip, ent.service_port)));
 		} else {

src/rpc/kubernetes.rs

@@ -63,10 +63,8 @@ pub async fn get_kubernetes_nodes(
 		let pubkey = &node
 			.metadata
 			.name
-			.map(|k| hex::decode(&k).ok())
-			.flatten()
-			.map(|k| NodeID::from_slice(&k[..]))
-			.flatten();
+			.and_then(|k| hex::decode(&k).ok())
+			.and_then(|k| NodeID::from_slice(&k[..]));
 
 		if let Some(pubkey) = pubkey {
 			ret.push((*pubkey, SocketAddr::new(node.spec.address, node.spec.port)))

src/rpc/rpc_helper.rs

@@ -322,8 +322,7 @@ impl RpcHelper {
 					let peer_avg_ping = peer_list
 						.iter()
 						.find(|x| x.id.as_ref() == to.as_slice())
-						.map(|pi| pi.avg_ping)
-						.flatten()
+						.and_then(|pi| pi.avg_ping)
 						.unwrap_or_else(|| Duration::from_secs(1));
 					(
 						to != self.0.our_node_id,