ices/9307.sh: fixed with no errors

[github-actions]

Issue: rust-lang/rust#9307

#!/bin/bash

# Taken from #78806.

rustc --crate-type=lib -Z mir-opt-level=1 -Z new-llvm-pass-manager=yes -Z unsound-mir-opts=yes -Z verify-llvm-ir=yes -Z validate-mir=yes -Z polonius=yes -Z polymorphize=yes -C debuginfo=2 -C opt-level=1 - << EOF
#![feature(no_core, lang_items)]
#![no_core]

#[lang = "sized"]
trait Sized {}

#[lang = "copy"]
trait Copy {}

#[no_mangle]
fn test() {
    &1;
}

EOF

=== stdout ===
=== stderr ===
warning: unused borrow that must be used
  --> <anon>:12:5
   |
12 |     &1;
   |     ^^ the borrow produces a value
   |
   = note: `#[warn(unused_must_use)]` on by default
help: use `let _ = ...` to ignore the resulting value
   |
12 |     let _ = &1;
   |     +++++++

warning: 1 warning emitted

==============

[Alexendoo]

bisects to rust-lang/rust#96326, not really sure what to do about this one. I'm fairly sure the upstream issue itself isn't fixed