Remove HAL initialization from #[embassy::main] macro.

examples/nrf/src/bin/pubsub.rs

@@ -20,7 +20,8 @@ enum Message {
 }
 
 #[embassy_executor::main]
-async fn main(spawner: Spawner, _p: embassy_nrf::Peripherals) {
+async fn main(spawner: Spawner) {
+    let _p = embassy_nrf::init(Default::default());
     defmt::info!("Hello World!");
 
     // It's good to set up the subscribers before publishing anything.