ices/78652.rs: fixed with no errors

[github-actions]

Issue: rust-lang/rust#78652

#![unstable(feature = "humans", issue = "none")]
#![feature(staged_api)]
struct Foo;
impl Foo {
    #[stable(feature = "rust1", since = "1.0.0")]
    const fn gated() -> u32 {
        42
    }
}

fn main() {}

=== stdout ===
=== stderr ===
warning: struct is never constructed: `Foo`
 --> /home/runner/work/glacier/glacier/ices/78652.rs:3:8
  |
3 | struct Foo;
  |        ^^^
  |
  = note: `#[warn(dead_code)]` on by default

warning: associated function is never used: `gated`
 --> /home/runner/work/glacier/glacier/ices/78652.rs:6:14
  |
6 |     const fn gated() -> u32 {
  |              ^^^^^

warning: 2 warnings emitted

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