remove deprecated impl for Nr trait

Author: hellow554

src/interrupt.rs

@@ -1,6 +1,6 @@
 //! Interrupts
 
-pub use bare_metal::{CriticalSection, Mutex, Nr};
+pub use bare_metal::{CriticalSection, Mutex};
 
 /// Trait for enums of external interrupt numbers.
 ///
@@ -23,15 +23,6 @@ pub unsafe trait InterruptNumber: Copy {
     fn number(self) -> u16;
 }
 
-/// Implement InterruptNumber for the old bare_metal::Nr trait.
-/// This implementation is for backwards compatibility only and will be removed in cortex-m 0.8.
-unsafe impl<T: Nr + Copy> InterruptNumber for T {
-    #[inline]
-    fn number(self) -> u16 {
-        self.nr() as u16
-    }
-}
-
 /// Disables all interrupts
 #[inline]
 pub fn disable() {