chore(deps): remove memoffset dependency (#7573)

`offset_of!` macro [became stable in Rust 1.77.0](https://doc.rust-lang.org/nightly/core/mem/macro.offset_of.html) which is now within our MSRV. Remove the `memoffset` crate, and use `std::mem::offset_of` instead.

Cargo.toml

@@ -158,7 +158,6 @@ lazy_static = "1.5.0"
 log = "0.4.22"
 markdown = "1.0.0-alpha.21"
 memchr = "2.7.4"
-memoffset = "0.9.1"
 miette = { package = "oxc-miette", version = "1.0.2", features = ["fancy-no-syscall"] }
 mimalloc = "0.1.43"
 mime_guess = "2.0.5"

crates/oxc_traverse/Cargo.toml

@@ -33,5 +33,4 @@ oxc_syntax = { workspace = true }
 
 compact_str = { workspace = true }
 itoa = { workspace = true }
-memoffset = { workspace = true }
 rustc-hash = { workspace = true }

crates/oxc_traverse/scripts/lib/ancestor.mjs

@@ -121,9 +121,7 @@ export default function generateAncestorsCode(types) {
       clippy::needless_lifetimes
     )]
 
-    use std::{cell::Cell, marker::PhantomData};
-
-    use memoffset::offset_of;
+    use std::{cell::Cell, marker::PhantomData, mem::offset_of};
 
     use oxc_allocator::{Address, Box, GetAddress, Vec};
     use oxc_ast::ast::*;

crates/oxc_traverse/src/generated/ancestor.rs

@@ -11,9 +11,7 @@
     clippy::needless_lifetimes
 )]
 
-use std::{cell::Cell, marker::PhantomData};
-
-use memoffset::offset_of;
+use std::{cell::Cell, marker::PhantomData, mem::offset_of};
 
 use oxc_allocator::{Address, Box, GetAddress, Vec};
 use oxc_ast::ast::*;