fix by cargo

src/main.rs

@@ -1,5 +1,4 @@
 mod polygon_draw;
-use iced::advanced::subscription;
 use iced::keyboard::Modifiers;
 use polygon_draw::Polygon;
 
@@ -14,17 +13,14 @@ use utils::{is_delta_format_valid, str_to_sec};
 
 use std::fs;
 
-use smol_str;
-use smol_str::SmolStr;
-
 use iced::widget::{TextInput, column, text};
 use iced::{
     Color, Event, Length, Padding, Task, Theme,
     event::{self, Status},
-    keyboard::{Event::KeyPressed, Key, key::Named},
+    keyboard::{Key, key::Named},
     widget::{Column, button, canvas, container, pick_list, row, scrollable, slider},
 };
-use iced::{Element, Font, Subscription, keyboard};
+use iced::{Element, Font};
 use iced_aw::widget::color_picker;
 
 use std::f32::consts::PI;