Change as_uninit_* methods on NonNull from taking self by

reference to taking `self` by value. This is consistent with the methods
of the same names on primitive pointers. The returned lifetime was
already previously unbounded.

library/core/src/ptr/non_null.rs

@@ -124,7 +124,7 @@ impl<T: Sized> NonNull<T> {
     #[must_use]
     #[unstable(feature = "ptr_as_uninit", issue = "75402")]
     #[rustc_const_unstable(feature = "const_ptr_as_ref", issue = "91822")]
-    pub const unsafe fn as_uninit_ref<'a>(&self) -> &'a MaybeUninit<T> {
+    pub const unsafe fn as_uninit_ref<'a>(self) -> &'a MaybeUninit<T> {
         // SAFETY: the caller must guarantee that `self` meets all the
         // requirements for a reference.
         unsafe { &*self.cast().as_ptr() }
@@ -158,7 +158,7 @@ impl<T: Sized> NonNull<T> {
     #[must_use]
     #[unstable(feature = "ptr_as_uninit", issue = "75402")]
     #[rustc_const_unstable(feature = "const_ptr_as_ref", issue = "91822")]
-    pub const unsafe fn as_uninit_mut<'a>(&mut self) -> &'a mut MaybeUninit<T> {
+    pub const unsafe fn as_uninit_mut<'a>(self) -> &'a mut MaybeUninit<T> {
         // SAFETY: the caller must guarantee that `self` meets all the
         // requirements for a reference.
         unsafe { &mut *self.cast().as_ptr() }
@@ -592,7 +592,7 @@ impl<T> NonNull<[T]> {
     #[must_use]
     #[unstable(feature = "ptr_as_uninit", issue = "75402")]
     #[rustc_const_unstable(feature = "const_ptr_as_ref", issue = "91822")]
-    pub const unsafe fn as_uninit_slice<'a>(&self) -> &'a [MaybeUninit<T>] {
+    pub const unsafe fn as_uninit_slice<'a>(self) -> &'a [MaybeUninit<T>] {
         // SAFETY: the caller must uphold the safety contract for `as_uninit_slice`.
         unsafe { slice::from_raw_parts(self.cast().as_ptr(), self.len()) }
     }
@@ -655,7 +655,7 @@ impl<T> NonNull<[T]> {
     #[must_use]
     #[unstable(feature = "ptr_as_uninit", issue = "75402")]
     #[rustc_const_unstable(feature = "const_ptr_as_ref", issue = "91822")]
-    pub const unsafe fn as_uninit_slice_mut<'a>(&self) -> &'a mut [MaybeUninit<T>] {
+    pub const unsafe fn as_uninit_slice_mut<'a>(self) -> &'a mut [MaybeUninit<T>] {
         // SAFETY: the caller must uphold the safety contract for `as_uninit_slice_mut`.
         unsafe { slice::from_raw_parts_mut(self.cast().as_ptr(), self.len()) }
     }