ices/60619.rs: fixed with errors

[github-actions]

Issue: rust-lang/rust#60619

pub struct Foo<const LEN: usize> {
    buf: [u8; {LEN * 2}]
}

fn main() {}

=== stdout ===
=== stderr ===
error: generic parameters may not be used in const operations
 --> /home/runner/work/glacier/glacier/ices/60619.rs:2:16
  |
2 |     buf: [u8; {LEN * 2}]
  |                ^^^ cannot perform const operation using `LEN`
  |
  = help: const parameters may only be used as standalone arguments, i.e. `LEN`
  = help: use `#![feature(const_generics)]` and `#![feature(const_evaluatable_checked)]` to allow generic const expressions

warning: unnecessary braces around const expression
 --> /home/runner/work/glacier/glacier/ices/60619.rs:2:15
  |
2 |     buf: [u8; {LEN * 2}]
  |               ^^^^^^^^^ help: remove these braces
  |
  = note: `#[warn(unused_braces)]` on by default

error: aborting due to previous error; 1 warning emitted

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

[JohnTitor]

The issue was closed as duplicate.