remove stdlib functions stabilized in 1.59.0

Author: pietroalbini

posts/2022-01-13-Rust-1.58.0.md

@@ -133,7 +133,6 @@ The following methods and trait implementations were stabilized.
 - [`Option::unwrap_unchecked`]
 - [`Result::unwrap_unchecked`]
 - [`Result::unwrap_err_unchecked`]
-- [`NonZero{unsigned}::is_power_of_two`]
 
 The following previously stable functions are now `const`.
 
@@ -145,10 +144,6 @@ The following previously stable functions are now `const`.
 - [`Duration::checked_mul`]
 - [`Duration::saturating_mul`]
 - [`Duration::checked_div`]
-- [`MaybeUninit::as_ptr`]
-- [`MaybeUninit::as_mut_ptr`]
-- [`MaybeUninit::assume_init`]
-- [`MaybeUninit::assume_init_ref`]
 
 [`Metadata::is_symlink`]: https://doc.rust-lang.org/stable/std/fs/struct.Metadata.html#method.is_symlink
 [`Path::is_symlink`]: https://doc.rust-lang.org/stable/std/path/struct.Path.html#method.is_symlink