ices/85635.rs: fixed with no errors

[github-actions]

Issue: rust-lang/rust#85635

#![feature(generators)]
#![feature(box_syntax)]

fn main() {
    || box yield;
}

=== stdout ===
=== stderr ===
warning: unused generator that must be used
 --> /home/runner/work/glacier/glacier/ices/85635.rs:5:5
  |
5 |     || box yield;
  |     ^^^^^^^^^^^^^
  |
  = note: `#[warn(unused_must_use)]` on by default
  = note: generators are lazy and do nothing unless resumed

warning: 1 warning emitted

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