Rollup merge of #143378 - hkBst:clippy-fix-6, r=tgross35

simplify receivers for some array method calls

Author: jhpratt

library/core/src/array/mod.rs

@@ -707,7 +707,7 @@ impl<T, const N: usize> [T; N] {
     )]
     #[inline]
     pub fn split_array_ref<const M: usize>(&self) -> (&[T; M], &[T]) {
-        (&self[..]).split_first_chunk::<M>().unwrap()
+        self.split_first_chunk::<M>().unwrap()
     }
 
     /// Divides one mutable array reference into two at an index.
@@ -740,7 +740,7 @@ 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_first_chunk_mut::<M>().unwrap()
+        self.split_first_chunk_mut::<M>().unwrap()
     }
 
     /// Divides one array reference into two at an index from the end.
@@ -785,7 +785,7 @@ impl<T, const N: usize> [T; N] {
     )]
     #[inline]
     pub fn rsplit_array_ref<const M: usize>(&self) -> (&[T], &[T; M]) {
-        (&self[..]).split_last_chunk::<M>().unwrap()
+        self.split_last_chunk::<M>().unwrap()
     }
 
     /// Divides one mutable array reference into two at an index from the end.
@@ -818,7 +818,7 @@ 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[..]).split_last_chunk_mut::<M>().unwrap()
+        self.split_last_chunk_mut::<M>().unwrap()
     }
 }