Remove dead code from four platform shims, bun_core, and bun_resolver

src/bun_core/util.rs

@@ -3838,8 +3838,7 @@ pub(crate) fn set_bun_options_argc(n: usize) {
 }
 
 /// Trait for arg types accepted by [`append_options_env`].
-/// Impl'd for `bun_core::String`
-/// and `Box<ZStr>` in their owning crates.
+/// Impl'd for `&'static ZStr` and `bun_core::String`.
 pub trait OptionsEnvArg {
     fn from_slice(s: &[u8]) -> Self;
     fn from_buf(buf: Vec<u8>) -> Self;
@@ -3863,22 +3862,6 @@ impl OptionsEnvArg for &'static ZStr {
     }
 }
 
-/// Owned `Box<ZStr>` arm of `appendOptionsEnv` — used by `bun::init_argv`'s
-/// BUN_OPTIONS splice path, which stores argv entries as `Box<ZStr>`.
-impl OptionsEnvArg for Box<ZStr> {
-    fn from_slice(s: &[u8]) -> Self {
-        ZStr::boxed(s)
-    }
-    fn from_buf(mut buf: Vec<u8>) -> Self {
-        buf.push(0);
-        let b: Box<[u8]> = buf.into_boxed_slice();
-        // SAFETY: `ZStr` is `#[repr(transparent)]` over `[u8]`; the fat-pointer
-        // metadata (len includes the trailing NUL) is preserved by the cast —
-        // identical to `ZStr::boxed` but consuming the Vec without re-copying.
-        unsafe { crate::heap::take(crate::heap::into_raw(b) as *mut ZStr) }
-    }
-}
-
 /// Parse a `BUN_OPTIONS`-style string
 /// (`--flag=value --flag2 "quoted value" bare`) and insert each token into
 /// `args` starting at index 1 (callers prepend a placeholder at [0]).

src/io/io_darwin.cpp

@@ -102,17 +102,4 @@ extern "C" bool io_darwin_schedule_wakeup(mach_port_t waker)
     }
 }
 
-#else
-
-// stub out these symbols
-extern "C" int io_darwin_create_machport(int fd,
-    void* wakeup_buffer_,
-    unsigned long long nbytes)
-{
-    return 0;
-}
-
-// stub out these symbols
-extern "C" bool io_darwin_schedule_wakeup(void* waker) { return false; }
-
-#endif
+#endif // __APPLE__

src/jsc/bindings/NoOrphansTracker.cpp

@@ -268,12 +268,4 @@ extern "C" void Bun__noOrphans_onFork() { Bun::NoOrphansTracker::get().scan(); }
 extern "C" void Bun__noOrphans_onExit(pid_t pid) { Bun::NoOrphansTracker::get().onExit(pid); }
 extern "C" void Bun__noOrphans_killTracked() { Bun::NoOrphansTracker::get().killTracked(); }
 
-#else // !OS(DARWIN)
-
-extern "C" void Bun__noOrphans_begin(int, int) {}
-extern "C" void Bun__noOrphans_releaseKq() {}
-extern "C" void Bun__noOrphans_onFork() {}
-extern "C" void Bun__noOrphans_onExit(int) {}
-extern "C" void Bun__noOrphans_killTracked() {}
-
-#endif
+#endif // OS(DARWIN)

src/jsc/bindings/image_coregraphics_shim.cpp

@@ -592,14 +592,4 @@ int64_t bun_coregraphics_clipboard_change_count()
 
 } // extern "C"
 
-#else
-// Non-Apple: stubs so the link succeeds; callers only reference these on
-// macOS so they're dead code, but LTO needs the definitions.
-extern "C" int bun_coregraphics_decode(const void*, unsigned long, unsigned long long, void*, void*, void*) { return 1; }
-extern "C" int bun_coregraphics_encode(const void*, unsigned, unsigned, int, int, void*, void*) { return 1; }
-extern "C" int bun_coregraphics_scale(const void*, unsigned, unsigned, void*, unsigned, unsigned) { return 1; }
-extern "C" int bun_coregraphics_rotate90(const void*, unsigned, unsigned, void*, unsigned) { return 1; }
-extern "C" int bun_coregraphics_reflect(const void*, unsigned, unsigned, void*, int) { return 1; }
-extern "C" int bun_coregraphics_clipboard(void*, void*, int) { return 1; }
-extern "C" long long bun_coregraphics_clipboard_change_count() { return -1; }
-#endif
+#endif // defined(__APPLE__)

src/jsc/bindings/image_wic_shim.cpp

@@ -54,9 +54,4 @@ extern "C" int32_t bun_wic_propbag_write_u8(void* props, const wchar_t* name, ui
     return write1(props, name, VT_UI1, [](VARIANT& var) { var.bVal = v; });
 }
 
-#else
-// Stubs so the symbols exist everywhere; backend_wic.rs is Windows-only so
-// these are never called, but the linker wants them.
-extern "C" int bun_wic_propbag_write_f32(void*, const void*, float) { return 0; }
-extern "C" int bun_wic_propbag_write_u8(void*, const void*, unsigned char) { return 0; }
-#endif
+#endif // defined(_WIN32)

src/resolver/lib.rs

@@ -2211,16 +2211,6 @@ pub mod cache {
         }
     }
 
-    impl From<Box<[u8]>> for Contents {
-        fn from(b: Box<[u8]>) -> Self {
-            if b.is_empty() {
-                Contents::Empty
-            } else {
-                Contents::Owned(b.into_vec())
-            }
-        }
-    }
-
     /// Adapter for the canonical `fs::read_file_contents` (returns
     /// `Cow<'buf,[u8]>` per the spec `PathContentsPair` shape). `Borrowed`
     /// always points into the per-thread `shared_buffer` on the