Remove dependency on the parity repo (#734)

substrate/core/network-libp2p/src/traits.rs

@@ -20,10 +20,9 @@ use std::iter;
 use std::net::Ipv4Addr;
 use std::str;
 use std::time::Duration;
-use io::TimerToken;
+use TimerToken;
 use libp2p::{multiaddr::AddrComponent, Multiaddr};
 use error::Error;
-use ethkey::Secret;
 use ethereum_types::H512;
 
 /// Protocol handler level packet id
@@ -37,6 +36,9 @@ pub type NodeId = H512;
 /// Local (temporary) peer session ID.
 pub type NodeIndex = usize;
 
+/// secio secret key;
+pub type Secret = [u8; 32];
+
 /// Shared session information
 #[derive(Debug, Clone)]
 pub struct SessionInfo {