abi layout: remove pqp_cg_ssa patch for #[repr(SIMD)]

Author: Firestar99

crates/rustc_codegen_spirv/build.rs

@@ -234,17 +234,6 @@ pub(super) fn elf_e_flags(architecture: Architecture, sess: &Session) -> u32 {",
                 );
             } else if relative_path == Path::new("src/mir/operand.rs") {
                 src = src.replace("alloca(field.size,", "typed_alloca(llfield_ty,");
-
-                // HACK(eddyb) non-array `#[repr(simd)]` workarounds (see `src/abi.rs`).
-                src = src.replace("if constant_ty.is_simd() {", "if false {");
-                src = src.replace(
-                    "match (self.val, self.layout.backend_repr) {",
-                    "match (self.val, self.layout.backend_repr) {
-                // `#[repr(simd)]` types are also immediate.
-                (OperandValue::Immediate(llval), BackendRepr::SimdVector { element, .. }) => {
-                    (Some(element), bx.extract_element(llval, bx.cx().const_usize(i as u64)))
-                }",
-                );
             }
 
             fs::write(out_path, src)?;