Rollup merge of #50808 - SimonSapin:nonzero, r=alexcrichton

Stabilize num::NonZeroU*

Tracking issue: https://github.com/rust-lang/rust/issues/49137

src/libstd/lib.rs

@@ -277,7 +277,6 @@
 #![feature(needs_panic_runtime)]
 #![feature(never_type)]
 #![feature(exhaustive_patterns)]
-#![feature(nonzero)]
 #![feature(num_bits_bytes)]
 #![feature(old_wrapping)]
 #![feature(on_unimplemented)]

src/libstd/num.rs

@@ -21,12 +21,8 @@ pub use core::num::{FpCategory, ParseIntError, ParseFloatError, TryFromIntError}
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use core::num::Wrapping;
 
-#[unstable(feature = "nonzero", issue = "49137")]
-#[allow(deprecated)]
-pub use core::num::{
-    NonZeroU8, NonZeroI8, NonZeroU16, NonZeroI16, NonZeroU32, NonZeroI32,
-    NonZeroU64, NonZeroI64, NonZeroU128, NonZeroI128, NonZeroUsize, NonZeroIsize,
-};
+#[stable(feature = "nonzero", since = "1.28.0")]
+pub use core::num::{NonZeroU8, NonZeroU16, NonZeroU32, NonZeroU64, NonZeroU128, NonZeroUsize};
 
 #[cfg(test)] use fmt;
 #[cfg(test)] use ops::{Add, Sub, Mul, Div, Rem};