Auto merge of #29643 - petrochenkov:stability5, r=alexcrichton

Also remove `stable` stability annotations from inherent impls

(There will be a warning for useless stability annotations soon.)

r? @gankro

Author: bors

src/liballoc/arc.rs

@@ -881,7 +881,6 @@ impl<T> fmt::Pointer for Arc<T> {
 
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<T: Default> Default for Arc<T> {
-    #[stable(feature = "rust1", since = "1.0.0")]
     fn default() -> Arc<T> {
         Arc::new(Default::default())
     }

src/liballoc/boxed.rs

@@ -264,15 +264,13 @@ impl<T : ?Sized> Box<T> {
 
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<T: Default> Default for Box<T> {
-    #[stable(feature = "rust1", since = "1.0.0")]
     fn default() -> Box<T> {
         box Default::default()
     }
 }
 
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<T> Default for Box<[T]> {
-    #[stable(feature = "rust1", since = "1.0.0")]
     fn default() -> Box<[T]> {
         Box::<[T; 0]>::new([])
     }

src/liballoc/rc.rs

@@ -508,7 +508,6 @@ impl<T: Default> Default for Rc<T> {
     /// let x: Rc<i32> = Default::default();
     /// ```
     #[inline]
-    #[stable(feature = "rust1", since = "1.0.0")]
     fn default() -> Rc<T> {
         Rc::new(Default::default())
     }

src/libcollections/btree/map.rs

@@ -903,7 +903,6 @@ impl<K: Hash, V: Hash> Hash for BTreeMap<K, V> {
 
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<K: Ord, V> Default for BTreeMap<K, V> {
-    #[stable(feature = "rust1", since = "1.0.0")]
     fn default() -> BTreeMap<K, V> {
         BTreeMap::new()
     }

src/libcollections/btree/set.rs

@@ -559,7 +559,6 @@ impl<'a, T: 'a + Ord + Copy> Extend<&'a T> for BTreeSet<T> {
 
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<T: Ord> Default for BTreeSet<T> {
-    #[stable(feature = "rust1", since = "1.0.0")]
     fn default() -> BTreeSet<T> {
         BTreeSet::new()
     }

src/libcollections/linked_list.rs

@@ -230,7 +230,6 @@ impl<T> LinkedList<T> {
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<T> Default for LinkedList<T> {
     #[inline]
-    #[stable(feature = "rust1", since = "1.0.0")]
     fn default() -> LinkedList<T> { LinkedList::new() }
 }
 

src/libcollections/slice.rs

@@ -160,7 +160,6 @@ mod hack {
 /// Allocating extension methods for slices.
 #[lang = "slice"]
 #[cfg(not(test))]
-#[stable(feature = "rust1", since = "1.0.0")]
 impl<T> [T] {
     /// Returns the number of elements in the slice.
     ///

src/libcollections/str.rs

@@ -153,7 +153,6 @@ impl ToOwned for str {
 /// Any string that can be represented as a slice.
 #[lang = "str"]
 #[cfg(not(test))]
-#[stable(feature = "rust1", since = "1.0.0")]
 impl str {
     /// Returns the length of `self` in bytes.
     ///

src/libcollections/string.rs

@@ -990,7 +990,6 @@ impl_eq! { Cow<'a, str>, String }
 #[stable(feature = "rust1", since = "1.0.0")]
 impl Default for String {
     #[inline]
-    #[stable(feature = "rust1", since = "1.0.0")]
     fn default() -> String {
         String::new()
     }

src/libcollections/vec.rs

@@ -1401,7 +1401,6 @@ impl<T> Drop for Vec<T> {
 
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<T> Default for Vec<T> {
-    #[stable(feature = "rust1", since = "1.0.0")]
     fn default() -> Vec<T> {
         Vec::new()
     }