ices/67739.rs: fixed with errors

=== stdout ===
=== stderr ===
error: array lengths can't depend on generic parameters
  --> /home/runner/work/glacier/glacier/ices/67739.rs:10:15
   |
10 |         [0u8; mem::size_of::<Self::Associated>()];
   |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to previous error

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

Author: rustbot