diff --git a/ch32v-insert-coin/src/main.rs b/ch32v-insert-coin/src/main.rs
index a208ea8..3b1ff43 100644
--- a/ch32v-insert-coin/src/main.rs
+++ b/ch32v-insert-coin/src/main.rs
@@ -15,7 +15,7 @@ use synthesizer::AppSynthesizers;
 
 mod app;
 use app::{
-    sequencer::BasicSequence, App, Config, Interfaces, Sequences, Services, State, TimerConfig,
+    App, Config, Interfaces, Sequences, Services, State, TimerConfig, sequencer::BasicSequence,
 };
 
 use ch32_hal::{adc::AdcChannel, interrupt::typelevel::Handler, timer::low_level::OutputPolarity};
@@ -99,19 +99,6 @@ impl<'a> DebouncedGPIO<'a> {
     }
 }
 
-// DeepSleep --coin button irq--> Active
-// Active --2s button--> Idle
-// Idle/Active --5s button--> DeepSleep
-
-pub enum SystemState {
-    // system is asleep, waiting for wake from coin insertion
-    DeepSleep,
-    // system is in low-power mode, dimmed lights, waiting for interaction
-    Idle,
-    // system is active. on entry: play coin sound. on button press: play different sound
-    Active,
-}
-
 #[derive(Debug)]
 struct Flag {
     value: bool,