refactor(data_structures): remove NonNull shim (#8423)

The `NonNull` shim in `oxc_data_structures` was just to emulate native APIs which only became stable in Rust 1.80.0. #8407 bumped our MSRV to 1.80.0, so now we can remove the shim and use `std::ptr::NonNull` directly.

crates/oxc_data_structures/src/stack/common.rs

@@ -3,12 +3,13 @@
 use std::{
     alloc::{self, Layout},
     mem::{align_of, size_of},
-    ptr, slice,
+    ptr::{self, NonNull},
+    slice,
 };
 
 use assert_unchecked::assert_unchecked;
 
-use super::{NonNull, StackCapacity};
+use super::StackCapacity;
 
 pub trait StackCommon<T>: StackCapacity<T> {
     // Getter + setter methods defined by implementer

crates/oxc_data_structures/src/stack/mod.rs

@@ -9,13 +9,11 @@
 mod capacity;
 mod common;
 mod non_empty;
-mod non_null;
 mod sparse;
 mod standard;
 
 use capacity::StackCapacity;
 use common::StackCommon;
 pub use non_empty::NonEmptyStack;
-use non_null::NonNull;
 pub use sparse::SparseStack;
 pub use standard::Stack;

crates/oxc_data_structures/src/stack/non_empty.rs

@@ -3,9 +3,10 @@
 use std::{
     mem::size_of,
     ops::{Deref, DerefMut},
+    ptr::NonNull,
 };
 
-use super::{NonNull, StackCapacity, StackCommon};
+use super::{StackCapacity, StackCommon};
 
 /// A stack which can never be empty.
 ///

crates/oxc_data_structures/src/stack/standard.rs

@@ -3,9 +3,10 @@
 use std::{
     mem::size_of,
     ops::{Deref, DerefMut},
+    ptr::NonNull,
 };
 
-use super::{NonNull, StackCapacity, StackCommon};
+use super::{StackCapacity, StackCommon};
 
 /// A simple stack.
 ///