src: drop unused modules

src/lib8.rs

@@ -1,5 +1,4 @@
 use palette::convert::FromColorUnclamped;
-use palette::blend::{PreAlpha, Premultiply};
 use palette::encoding::srgb::Srgb;
 use palette::Hsv;
 use embedded_graphics::pixelcolor::RgbColor;

src/task.rs

@@ -1,5 +1,4 @@
 use std::fmt;
-use std::time::{Duration, Instant};
 
 pub trait Task {
     fn tick(&mut self) {}