Add conditional complation for unused methods

Signed-off-by: Lee Smet <lee.smet@hotmail.com>

mycelium/src/packet_queue.rs

@@ -229,6 +229,7 @@ impl PacketQueue {
     }
 
     /// Check if there are any packets queued for the given subnet.
+    #[cfg(test)]
     pub fn has_packets(&self, subnet: &Subnet) -> bool {
         self.queue
             .get(subnet)
@@ -237,6 +238,7 @@ impl PacketQueue {
     }
 
     /// Get the total number of packets currently queued.
+    #[cfg(test)]
     pub fn total_count(&self) -> usize {
         self.total_count.load(Ordering::Relaxed)
     }

mycelium/src/router.rs

@@ -128,6 +128,7 @@ where
     /// Returns the Router and two receivers:
     /// - `pending_packet_rx`: unencrypted packets that were queued and are now ready to be processed
     /// - `timeout_packet_rx`: unencrypted packets that timed out waiting for route discovery (for ICMP generation)
+    #[allow(clippy::type_complexity)]
     pub fn new(
         update_workers: usize,
         node_tun: UnboundedSender<DataPacket>,