Remove stub discover module.

zebra-network/src/peer_set.rs

@@ -33,7 +33,6 @@ use crate::{
 };
 
 mod candidate_set;
-mod discover;
 mod set;
 mod unready_service;
 

zebra-network/src/peer_set/discover.rs

@@ -1,35 +0,0 @@
-use std::{
-    net::SocketAddr,
-    pin::Pin,
-    task::{Context, Poll},
-};
-
-use tokio::prelude::*;
-use tower::discover::{Change, Discover};
-
-use crate::peer::{PeerClient, PeerError};
-
-/// A [`tower::discover::Discover`] implementation to report new `PeerClient`s.
-///
-/// Because the `PeerClient` and `PeerServer` are always created together, either
-/// by a `PeerConnector` or a `PeerListener`, and the `PeerServer` spawns a task
-/// owned by Tokio, we only need to manage the `PeerClient` handles.
-pub struct PeerDiscover {
-    // add fields;
-}
-
-impl Discover for PeerDiscover {
-    type Key = SocketAddr;
-    type Service = PeerClient;
-    type Error = PeerError;
-
-    fn poll_discover(
-        self: Pin<&mut Self>,
-        cx: &mut Context<'_>,
-    ) -> Poll<Result<Change<Self::Key, Self::Service>, Self::Error>> {
-        // Do stuff and possibly produce new peers??
-
-        // Change enum has insert and delete variants, but we only need to consider inserts here..
-        unimplemented!();
-    }
-}