ices/80772.rs: fixed with no errors

[github-actions]

Issue: rust-lang/rust#80772

trait SomeTrait {}

struct Exhibit {
    constant: usize,
    factory: fn(&usize) -> Box<dyn SomeTrait>,
}

const A_CONSTANT: &[Exhibit] = &[
    Exhibit {
        constant: 1,
        factory: |_| unimplemented!(),
    },
    Exhibit {
        constant: "Hello world".len(),
        factory: |_| unimplemented!(),
    },
];

fn main() {}

=== stdout ===
=== stderr ===
warning: struct is never constructed: `Exhibit`
 --> /home/runner/work/glacier/glacier/ices/80772.rs:3:8
  |
3 | struct Exhibit {
  |        ^^^^^^^
  |
  = note: `#[warn(dead_code)]` on by default

warning: constant is never used: `A_CONSTANT`
  --> /home/runner/work/glacier/glacier/ices/80772.rs:8:1
   |
8  | / const A_CONSTANT: &[Exhibit] = &[
9  | |     Exhibit {
10 | |         constant: 1,
11 | |         factory: |_| unimplemented!(),
...  |
16 | |     },
17 | | ];
   | |__^

warning: 2 warnings emitted

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