ices/66501.rs: fixed with no errors

[github-actions]

Issue: rust-lang/rust#66501

fn main() {
    const CONST: &[(); 1] = &[()];
    match &[()] {
        &[()] => {}
        CONST => {}
    }
}

=== stdout ===
=== stderr ===
warning: unreachable pattern
 --> /home/runner/work/glacier/glacier/ices/66501.rs:5:9
  |
5 |         CONST => {}
  |         ^^^^^
  |
  = note: `#[warn(unreachable_patterns)]` on by default

warning: 1 warning emitted

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

[Alexendoo]

covered in #463