address build with --no-default-features

Author: jxs

protocols/gossipsub/src/behaviour.rs

@@ -3214,6 +3214,8 @@ where
                     }
                 }
             }
+            // rpc is only used for metrics code
+            #[allow(unused_variables)]
             HandlerEvent::MessagesDropped(rpc) => {
                 // Account for this in the scoring logic
                 if let PeerScoreState::Active(peer_score) = &mut self.peer_score {

protocols/gossipsub/src/queue.rs

@@ -116,6 +116,7 @@ impl<T: Ord> Queue<T> {
     }
 
     /// Returns the length of the queue.
+    #[cfg(feature = "metrics")]
     pub(crate) fn len(&self) -> usize {
         let shared = self.shared.lock().expect("lock to not be poisoned");
         shared.queue.len()