Remove NetworkContext::io_channel() (#8625)

* Remove io_channel()

* Fix warning

util/network-devp2p/src/host.rs

@@ -153,10 +153,6 @@ impl<'s> NetworkContextTrait for NetworkContext<'s> {
 		self.session_id.map_or_else(|| Err(ErrorKind::Expired.into()), |id| self.send(id, packet_id, data))
 	}
 
-	fn io_channel(&self) -> IoChannel<NetworkIoMessage> {
-		self.io.channel()
-	}
-
 	fn disable_peer(&self, peer: PeerId) {
 		self.io.message(NetworkIoMessage::DisablePeer(peer))
 			.unwrap_or_else(|e| warn!("Error sending network IO message: {:?}", e));

util/network/src/lib.rs

@@ -39,7 +39,6 @@ use std::str::{self, FromStr};
 use std::sync::Arc;
 use std::time::Duration;
 use ipnetwork::{IpNetwork, IpNetworkError};
-use io::IoChannel;
 use ethkey::Secret;
 use ethereum_types::{H256, H512};
 use rlp::{Decodable, DecoderError, Rlp};
@@ -257,9 +256,6 @@ pub trait NetworkContext {
 	/// Respond to a current network message. Panics if no there is no packet in the context. If the session is expired returns nothing.
 	fn respond(&self, packet_id: PacketId, data: Vec<u8>) -> Result<(), Error>;
 
-	/// Get an IoChannel.
-	fn io_channel(&self) -> IoChannel<NetworkIoMessage>;
-
 	/// Disconnect a peer and prevent it from connecting again.
 	fn disable_peer(&self, peer: PeerId);
 
@@ -298,10 +294,6 @@ impl<'a, T> NetworkContext for &'a T where T: ?Sized + NetworkContext {
 		(**self).respond(packet_id, data)
 	}
 
-	fn io_channel(&self) -> IoChannel<NetworkIoMessage> {
-		(**self).io_channel()
-	}
-
 	fn disable_peer(&self, peer: PeerId) {
 		(**self).disable_peer(peer)
 	}