Solving primitive_types3 using std::array?

[mAddmHacks]

Hi all,
One solution, also given by the hint, is pretty straightforward, but why are we importing std::array ?

warning: unused import: `std::array`
 --> exercises/04_primitive_types/primitive_types3.rs:1:5
  |
1 | use std::array;
  |     ^^^^^^^^^^
  |
  = note: `#[warn(unused_imports)]` on by default


Output
Wow, that's a big array!

This is confusing, I'm wondering if there is a use case for a solution with an explicit array module usage

[mAddmHacks]

Can't find the import in source, I might have made a mistake somewhere