Remove unstable Result::into_ok_or_err

Author: dtolnay

patches/0024-core-Disable-portable-simd-test.patch

@@ -14,7 +14,6 @@ index 06c7be0..359e2e7 100644
 @@ -75,7 +75,6 @@
  #![feature(never_type)]
  #![feature(unwrap_infallible)]
- #![feature(result_into_ok_or_err)]
 -#![feature(portable_simd)]
  #![feature(ptr_metadata)]
  #![feature(once_cell)]