Removes network parameters from chain spec

beacon_node/network/src/service.rs

@@ -4,6 +4,7 @@ use crate::NetworkConfig;
 use beacon_chain::{BeaconChain, BeaconChainTypes};
 use crossbeam_channel::{unbounded as channel, Sender, TryRecvError};
 use eth2_libp2p::Service as LibP2PService;
+use eth2_libp2p::Topic;
 use eth2_libp2p::{Libp2pEvent, PeerId};
 use eth2_libp2p::{PubsubMessage, RPCEvent};
 use futures::prelude::*;
@@ -13,7 +14,6 @@ use slog::{debug, info, o, trace};
 use std::marker::PhantomData;
 use std::sync::Arc;
 use tokio::runtime::TaskExecutor;
-use types::Topic;
 
 /// Service that handles communication between internal services and the eth2_libp2p network service.
 pub struct Service<T: BeaconChainTypes> {