ices/105969.rs: fixed with no errors

=== stdout ===
=== stderr ===
warning: unused variable: `i`
 --> /home/runner/work/glacier/glacier/ices/105969.rs:8:9
  |
8 |     let i = foo as dyn* Debug;
  |         ^ help: if this is intentional, prefix it with an underscore: `_i`
  |
  = note: `#[warn(unused_variables)]` on by default

warning: constant `FOO` is never used
 --> /home/runner/work/glacier/glacier/ices/105969.rs:6:7
  |
6 | const FOO: () = {
  |       ^^^
  |
  = note: `#[warn(dead_code)]` on by default

warning: 2 warnings emitted

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

Author: rustbot