delete unnecessary code

src/usecase/tui/app.rs

@@ -1,3 +1,4 @@
+use super::{config, ui::ui};
 use crate::{
     file::toml,
     model::{
@@ -7,8 +8,6 @@ use crate::{
         runner, runner_type,
     },
 };
-
-use super::{config, ui::ui};
 use anyhow::{anyhow, bail, Result};
 use crossterm::{
     event::{DisableMouseCapture, EnableMouseCapture, KeyCode, KeyEvent},
@@ -31,9 +30,6 @@ use std::{
 };
 use tui_textarea::TextArea;
 
-// #[cfg(test)]
-// use crate::model::histories::Histories;
-
 // AppState represents the state of the application.
 // "Making impossible states impossible"
 // The type of `AppState` is defined according to the concept of 'Making Impossible States Impossible'.