ices/85447.rs: fixed with no errors

=== stdout ===
=== stderr ===
warning: unused import: `hash::Hash`
 --> /home/runner/work/glacier/glacier/ices/85447.rs:2:33
  |
2 | use std::{collections::HashMap, hash::Hash};
  |                                 ^^^^^^^^^^
  |
  = note: `#[warn(unused_imports)]` on by default

warning: 1 warning emitted

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