Remove [T]::array_chunks(_mut)

Author: scottmcm

patches/0027-sysroot_tests-128bit-atomic-operations.patch

@@ -19,7 +19,7 @@ index 1e336bf..35e6f54 100644
 -#![cfg_attr(target_has_atomic = "128", feature(integer_atomics))]
  #![cfg_attr(test, feature(cfg_select))]
  #![feature(alloc_layout_extra)]
- #![feature(array_chunks)]
+ #![feature(array_ptr_get)]
 diff --git a/coretests/tests/atomic.rs b/coretests/tests/atomic.rs
 index b735957..ea728b6 100644
 --- a/coretests/tests/atomic.rs