unused import: `Polynomial`

[come-maiz]

When running:

$ RAYON_NUM_THREADS=8 cargo test -j 8

I get:

warning: unused import: `Polynomial`
 --> tests/mse_e2e.rs:7:31
  |
7 | use chipmunk_code::{KahePoly, Polynomial};
  |                               ^^^^^^^^^^
  |
  = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default

More details of my testing set up and script in https://collective.flashbots.net/t/testing-panetiere/5868