Clean up warnings about unused variables

Author: sirhcel

src/11-usart/examples/buffer-overrun.rs

@@ -6,7 +6,7 @@ use aux11::{entry, iprint, iprintln};
 
 #[entry]
 fn main() -> ! {
-    let (usart1, mono_timer, itm) = aux11::init();
+    let (usart1, _mono_timer, _itm) = aux11::init();
 
     // Send a string
     for byte in b"The quick brown fox jumps over the lazy dog.".iter() {

src/11-usart/examples/echo.rs

@@ -7,7 +7,7 @@ use heapless::{consts, Vec};
 
 #[entry]
 fn main() -> ! {
-    let (usart1, mono_timer, itm) = aux11::init();
+    let (usart1, _mono_timer, _itm) = aux11::init();
 
     // A buffer with 32 bytes of capacity
     let mut buffer: Vec<u8, consts::U32> = Vec::new();

src/11-usart/examples/receive-a-single-byte.rs

@@ -7,7 +7,7 @@ use aux11::{entry, iprint, iprintln};
 
 #[entry]
 fn main() -> ! {
-    let (usart1, mono_timer, itm) = aux11::init();
+    let (usart1, _mono_timer, _itm) = aux11::init();
 
     loop {
         // Wait until there's data available

src/11-usart/examples/reverse-string.rs

@@ -8,7 +8,7 @@ use heapless::{consts, Vec};
 
 #[entry]
 fn main() -> ! {
-    let (usart1, mono_timer, itm) = aux11::init();
+    let (usart1, _mono_timer, _itm) = aux11::init();
 
     // A buffer with 32 bytes of capacity
     let mut buffer: Vec<u8, consts::U32> = Vec::new();

src/11-usart/examples/the-answer.rs

@@ -36,7 +36,7 @@ impl fmt::Write for SerialPort {
 
 #[entry]
 fn main() -> ! {
-    let (usart1, mono_timer, itm) = aux11::init();
+    let (usart1, _mono_timer, _itm) = aux11::init();
 
     let mut serial = SerialPort { usart1 };
 

src/11-usart/src/main.rs

@@ -6,7 +6,7 @@ use aux11::{entry, iprint, iprintln};
 
 #[entry]
 fn main() -> ! {
-    let (usart1, mono_timer, itm) = aux11::init();
+    let (usart1, _mono_timer, _itm) = aux11::init();
 
     // Send a single character
     usart1