fix crash on exit on windows?

src/client/mod.rs

@@ -68,7 +68,7 @@ impl Client {
         self.input.end();
 
         if self.exit {
-            self.renderer.send(RenderMessage::Exit).expect("AAAA");
+            let _ = self.renderer.send(RenderMessage::Exit);
             // you know I'd like to do a timeout here...
             // only because I have an NVIDIA GPU HELP
             self.render_handle

src/client/render/mod.rs

@@ -8,10 +8,7 @@ use super::camera::Camera;
 use crate::client::rsc::{CLEAR_COLOR, FRAME_TIME};
 use nalgebra::Vector2;
 use smaa::{SmaaMode, SmaaTarget};
-use std::{
+use std::time::{Duration, Instant};
-    sync::Arc,
-    time::{Duration, Instant},
-};
 use voxel::VoxelPipeline;
 use winit::dpi::PhysicalSize;