Fix some warnings.

embassy-nrf-examples/src/bin/buffered_uart.rs

@@ -40,7 +40,7 @@ async fn run() {
     let ppi = hal::ppi::Parts::new(p.PPI);
 
     let irq = interrupt::take!(UARTE0_UART0);
-    let mut u = buffered_uarte::BufferedUarte::new(
+    let u = buffered_uarte::BufferedUarte::new(
         p.UARTE0,
         p.TIMER0,
         ppi.ppi0,

embassy-nrf/src/lib.rs

@@ -2,6 +2,7 @@
 #![feature(generic_associated_types)]
 #![feature(asm)]
 #![feature(type_alias_impl_trait)]
+#![allow(incomplete_features)]
 
 #[cfg(not(any(
     feature = "52810",

embassy-stm32f4/src/lib.rs

@@ -2,6 +2,7 @@
 #![feature(generic_associated_types)]
 #![feature(asm)]
 #![feature(type_alias_impl_trait)]
+#![allow(incomplete_features)]
 
 #[cfg(not(any(
     feature = "stm32f401",

embassy/src/lib.rs

@@ -3,6 +3,7 @@
 #![feature(const_fn)]
 #![feature(const_fn_fn_ptr_basics)]
 #![feature(const_option)]
+#![allow(incomplete_features)]
 
 // This mod MUST go first, so that the others see its macros.
 pub(crate) mod fmt;