Remove `{,r}split_array_ref{,_mut}` methods from slices

The functionality of these methods from `split_array` has been absorbed by the
`slice_first_last_chunk` feature. This only affects the methods on slices,
not those with the same name that are implemented on array types.

Also adjusts testing to reflect this change.

1 files changed, 4 insertions, 4 deletions

diff --git a/library/core/src/array/mod.rs b/library/core/src/array/mod.rs
index ebd4a8c05fe..4f6eef4ef0d 100644
--- a/library/core/src/array/mod.rs
+++ b/library/core/src/array/mod.rs
@@ -647,7 +647,7 @@ impl<T, const N: usize> [T; N] {
     )]
     #[inline]
     pub fn split_array_ref<const M: usize>(&self) -> (&[T; M], &[T]) {
-        (&self[..]).split_array_ref::<M>()
+        (&self[..]).split_first_chunk::<M>().unwrap()
     }
 
     /// Divides one mutable array reference into two at an index.
@@ -680,7 +680,7 @@ impl<T, const N: usize> [T; N] {
     )]
     #[inline]
     pub fn split_array_mut<const M: usize>(&mut self) -> (&mut [T; M], &mut [T]) {
-        (&mut self[..]).split_array_mut::<M>()
+        (&mut self[..]).split_first_chunk_mut::<M>().unwrap()
     }
 
     /// Divides one array reference into two at an index from the end.
@@ -725,7 +725,7 @@ impl<T, const N: usize> [T; N] {
     )]
     #[inline]
     pub fn rsplit_array_ref<const M: usize>(&self) -> (&[T], &[T; M]) {
-        (&self[..]).rsplit_array_ref::<M>()
+        (&self[..]).split_last_chunk::<M>().unwrap()
     }
 
     /// Divides one mutable array reference into two at an index from the end.
@@ -758,7 +758,7 @@ impl<T, const N: usize> [T; N] {
     )]
     #[inline]
     pub fn rsplit_array_mut<const M: usize>(&mut self) -> (&mut [T], &mut [T; M]) {
-        (&mut self[..]).rsplit_array_mut::<M>()
+        (&mut self[..]).split_last_chunk_mut::<M>().unwrap()
     }
 }