message: Fix clippy errors in `small_network`
diff: @@ -349,6 +349,7 @@ where
  }
  }
  + #[allow(clippy::redundant_clone)]
  fn handle_incoming_connection(
  &mut self,
  effect_builder: EffectBuilder<REv>,
  @@ -436,7 +437,7 @@ where
  result: io::Result<()>,
  peer_id: Box<NodeId>,
  peer_addr: SocketAddr,
  - span: Box<Span>,
  + span: Span,
  ) -> Effects<Event<P>> {
  span.in_scope(|| {
  // Log the outcome.
  @@ -783,7 +784,7 @@ where
  peer_id,
  peer_addr,
  span,
  - } => self.handle_incoming_closed(result, peer_id, peer_addr, span),
  + } => self.handle_incoming_closed(result, peer_id, peer_addr, *span),
  Event::OutgoingEstablished {
  remote_addr,
  