cleanup imports

src/model.rs

@@ -3,9 +3,7 @@ use crate::{
     grid::{combine, Grid},
     palette::{random_palette, Palette},
 };
-
 use indicatif::{ProgressBar, ProgressStyle};
-// use rand::Rng;
 use rand_distr::{Distribution, Normal};
 use rayon::{iter::ParallelIterator, prelude::*};
 use std::time::Instant;