Don't propogate errors we'll never handle

tests/data_replicator.rs

@@ -21,7 +21,7 @@ fn test_node(exit: Arc<AtomicBool>) -> (Arc<RwLock<Crdt>>, Ncp, UdpSocket) {
     let crdt = Crdt::new(tn.info.clone()).expect("Crdt::new");
     let c = Arc::new(RwLock::new(crdt));
     let w = Arc::new(RwLock::new(vec![]));
-    let d = Ncp::new(&c.clone(), w, None, tn.sockets.gossip, exit).unwrap();
+    let d = Ncp::new(&c.clone(), w, None, tn.sockets.gossip, exit);
     (c, d, tn.sockets.replicate)
 }