Remove redundant nightly feature for fetch_min, fetch_max and fetch_update

See also rust-lang/rust#48655 (comment)

Author: tindzk

README.md

@@ -8,8 +8,7 @@ Traits over atomic primitive integer types.
 
 ## Notes
 
-* Enable feature `nightly` to get `min`, `max`, `fetch_update` and
-  `as_mut_ptr` when you have a nightly compiler available.
+* Enable feature `nightly` to get `as_mut_ptr` when you have a nightly compiler available.
 
 ## Copyright and License
 

src/lib.rs

@@ -1,4 +1,4 @@
-#![cfg_attr(feature = "nightly", feature(atomic_min_max, atomic_mut_ptr, no_more_cas))]
+#![cfg_attr(feature = "nightly", feature(atomic_mut_ptr))]
 use std::sync::atomic::{self, Ordering};
 use std::hash::Hash;
 use std::fmt::{Debug, Display};
@@ -64,13 +64,10 @@ pub trait AtomicInt : Default + Send + Sync + RefUnwindSafe + UnwindSafe {
         ordering: Ordering
     ) -> <Self as AtomicInt>::Prim;
 
-    #[cfg(feature="nightly")]
     fn fetch_min(&self, val: <Self as AtomicInt>::Prim, order: Ordering) -> <Self as AtomicInt>::Prim;
 
-    #[cfg(feature="nightly")]
     fn fetch_max(&self, val: <Self as AtomicInt>::Prim, order: Ordering) -> <Self as AtomicInt>::Prim;
 
-    #[cfg(feature="nightly")]
     fn fetch_update<F>(
         &self,
         f: F,
@@ -173,7 +170,6 @@ macro_rules! impl_atomic_int {
                 self.fetch_xor(new, ordering)
             }
 
-            #[cfg(feature = "nightly")]
             fn fetch_min(
                 &self,
                 val: $prim,
@@ -182,7 +178,6 @@ macro_rules! impl_atomic_int {
                 self.fetch_min(val, ordering)
             }
 
-            #[cfg(feature = "nightly")]
             fn fetch_max(
                 &self,
                 val: $prim,
@@ -191,7 +186,6 @@ macro_rules! impl_atomic_int {
                 self.fetch_max(val, ordering)
             }
 
-            #[cfg(feature = "nightly")]
             fn fetch_update<F>(
                 &self,
                 f: F,