cleanup and comment out unused functions

src/model.rs

@@ -194,7 +194,7 @@ impl Model {
 
     pub fn render_all_imgdata(&self) {
         if !Path::new("./tmp").exists() {
-            std::fs::create_dir("./tmp");
+            std::fs::create_dir("./tmp").expect("could create directory");
         }
 
         let pb = ProgressBar::new(self.img_data_vec.len() as u64);