std: remove unused features rustc warns about

Firestar99 · Firestar99 · commit 85cd1956665b · 2026-03-24T11:22:18.000+01:00
diff --git a/crates/spirv-std/src/lib.rs b/crates/spirv-std/src/lib.rs
@@ -2,7 +2,7 @@
 #![cfg_attr(
     target_arch = "spirv",
     allow(internal_features),
-    feature(asm_experimental_arch, core_intrinsics, lang_items, repr_simd)
+    feature(asm_experimental_arch, lang_items)
 )]
 // FIXME(eddyb) update/review these lints.
 //
