Remove dead code from bun_css, bun_react_compiler, bun_jsc, and smaller crates

src/CLAUDE.md

@@ -138,7 +138,7 @@ ASCII literals / `&'static` ASCII tables, bytes already validated as ASCII,
 or bytes that really are Latin-1; `utf16(units)`.
 `String::to_encoded_slice()` borrows any `String` as one;
 `EncodedSlice::to_utf8() -> Utf8Bytes<'a>`; `bun_jsc::EncodedSliceJsc` adds
-`to_js`, `to_{,type_,range_,syntax_}error_instance`, `to_json_object`, and
+`to_js`, `to_{,syntax_}error_instance`, `to_json_object`, and
 `to_external_value` / `external` (hand a globally-allocated buffer to JSC).
 
 Bytes → JS string: `bun_string_jsc::create_utf8_for_js(global, bytes)?`

src/bun_core/comptime_string_map.rs

@@ -44,34 +44,13 @@ pub trait HasLength {
     fn length(&self) -> usize;
 }
 
-impl HasLength for [u8] {
-    #[inline]
-    fn length(&self) -> usize {
-        self.len()
-    }
-}
-
 impl HasLength for &[u8] {
     #[inline]
     fn length(&self) -> usize {
         self.len()
     }
 }
 
-impl HasLength for &str {
-    #[inline]
-    fn length(&self) -> usize {
-        self.len()
-    }
-}
-
-impl HasLength for &crate::String {
-    #[inline]
-    fn length(&self) -> usize {
-        crate::String::length(self)
-    }
-}
-
 /// Lookup for large maps, which store their keys as data instead of as an
 /// inlined compare tree: keys are sorted by `(len, bytes)` and concatenated
 /// into `blob`; `buckets[len]` is `(blob offset, first sorted position)` of

src/bun_core_macros/lib.rs

@@ -467,7 +467,6 @@ pub fn derive_thread_safe_ref_counted(input: TokenStream) -> TokenStream {
 // Struct-level attribute:
 //   #[ref_count(destroy = <path>)]      — `unsafe fn(*mut Self)`; default is
 //                                         `drop(::bun_core::heap::take(this))`
-//   #[ref_count(debug_name = "Name")]   — overrides `RefCounted::debug_name()`
 //
 // Field selection follows the shared `find_ref_count_field` rules (a
 // `#[ref_count]`-annotated field, else a field literally named `ref_count`).
@@ -478,13 +477,9 @@ pub fn derive_thread_safe_ref_counted(input: TokenStream) -> TokenStream {
 // migrated structs keep their own bespoke `ref_`/`r#ref`/`deref` thin
 // wrappers — emitting inherent fns here would collide.
 
-/// Parse the struct-level `#[ref_count(destroy = …, debug_name = "…")]`
-/// attribute (both keys optional, either order).
-fn parse_ref_count_attrs(
-    attrs: &[syn::Attribute],
-) -> Result<(Option<syn::Expr>, Option<LitStr>), syn::Error> {
+/// Parse the struct-level `#[ref_count(destroy = …)]` attribute (optional).
+fn parse_ref_count_attrs(attrs: &[syn::Attribute]) -> Result<Option<syn::Expr>, syn::Error> {
     let mut destroy = None;
-    let mut debug_name = None;
     for a in attrs {
         if !a.path().is_ident("ref_count") {
             continue;
@@ -494,16 +489,13 @@ fn parse_ref_count_attrs(
                 if meta.path.is_ident("destroy") {
                     destroy = Some(meta.value()?.parse::<syn::Expr>()?);
                     Ok(())
-                } else if meta.path.is_ident("debug_name") {
-                    debug_name = Some(meta.value()?.parse::<LitStr>()?);
-                    Ok(())
                 } else {
                     Err(meta.error("unknown ref_count attribute key"))
                 }
             })?;
         }
     }
-    Ok((destroy, debug_name))
+    Ok(destroy)
 }
 
 /// `#[derive(RefCounted)]` — see module comment above.
@@ -526,7 +518,7 @@ pub fn derive_ref_counted(input: TokenStream) -> TokenStream {
         Ok(f) => f,
         Err(e) => return e.to_compile_error().into(),
     };
-    let (destroy, debug_name) = match parse_ref_count_attrs(&input.attrs) {
+    let destroy = match parse_ref_count_attrs(&input.attrs) {
         Ok(v) => v,
         Err(e) => return e.to_compile_error().into(),
     };
@@ -544,16 +536,9 @@ pub fn derive_ref_counted(input: TokenStream) -> TokenStream {
             drop(unsafe { ::bun_core::heap::take(this) });
         },
     };
-    let debug_name_impl = debug_name.map(|lit| {
-        quote! {
-            #[inline]
-            fn debug_name() -> &'static str { #lit }
-        }
-    });
 
     quote! {
         impl #impl_g ::bun_ptr::RefCounted for #name #ty_g #where_g {
-            #debug_name_impl
             #[inline]
             unsafe fn get_ref_count(this: *mut Self) -> *mut ::bun_ptr::RefCount<Self> {
                 // SAFETY: caller contract — `this` points to a live Self.

src/codegen/replacements.ts

@@ -40,10 +40,6 @@ for (let id = 0; id < jsclasses.length; id++) {
 
 // These rules are run on the entire file, including within strings.
 export const globalReplacements: ReplacementRule[] = [
-  {
-    from: /\bnotImplementedIssue\(\s*([0-9]+)\s*,\s*((?:"[^"]*"|'[^']+'))\s*\)/g,
-    toRaw: "__intrinsic__makeTypeError(`${$2} is not implemented yet. See https://github.com/oven-sh/bun/issues/$1`)",
-  },
   {
     from: /\bnotImplementedIssueFn\(\s*([0-9]+)\s*,\s*((?:"[^"]*"|'[^']+'))\s*\)/g,
     toRaw: