Index: third_party/rust/bytemuck/v1/BUILD.gn
--- third_party/rust/bytemuck/v1/BUILD.gn.orig
+++ third_party/rust/bytemuck/v1/BUILD.gn
@@ -52,7 +52,6 @@ cargo_crate("lib") {
     "derive",
     "extern_crate_alloc",
     "min_const_generics",
-    "nightly_portable_simd",
     "rustversion",
   ]
 
