Update for rust-lorawan and lora-phy version 2.

examples/nrf52840/src/bin/lora_cad.rs

@@ -41,10 +41,8 @@ async fn main(_spawner: Spawner) {
     let iv =
         GenericSx126xInterfaceVariant::new(nss, reset, dio1, busy, Some(rf_switch_rx), Some(rf_switch_tx)).unwrap();
 
-    let mut delay = Delay;
-
     let mut lora = {
-        match LoRa::new(SX1261_2::new(BoardType::Rak4631Sx1262, spim, iv), false, &mut delay).await {
+        match LoRa::new(SX1261_2::new(BoardType::Rak4631Sx1262, spim, iv), false, Delay).await {
             Ok(l) => l,
             Err(err) => {
                 info!("Radio error = {}", err);