删除多余引入

src/main.rs

@@ -4,10 +4,8 @@ use fltk::{
     enums::ColorDepth,
     frame::Frame,
     prelude::{GroupExt, WidgetBase, WidgetExt},
-    utils,
     window::Window,
 };
-use image::buffer::ConvertBuffer;
 use rscam::{Camera, Config};
 use std::io;