Remove #![deny(warnings)] (anti-pattern)

src/lib.rs

@@ -16,7 +16,6 @@
 //! - Wrappers around assembly instructions like `WFI`.
 
 #![no_std]
-#![deny(warnings)]
 #![cfg_attr(feature = "inline-asm", feature(asm))]
 
 extern crate bare_metal;