refactor: change import style

Author: CNLHC

embassy-stm32/src/timer/simple_pwm.rs

@@ -6,8 +6,7 @@ use core::mem::ManuallyDrop;
 use embassy_hal_internal::{into_ref, PeripheralRef};
 
 use super::low_level::{CountingMode, OutputCompareMode, OutputPolarity, Timer};
-use super::TimerBits;
-use super::{Channel, Channel1Pin, Channel2Pin, Channel3Pin, Channel4Pin, GeneralInstance4Channel};
+use super::{Channel, Channel1Pin, Channel2Pin, Channel3Pin, Channel4Pin, GeneralInstance4Channel, TimerBits};
 use crate::gpio::{AfType, AnyPin, OutputType, Speed};
 use crate::time::Hertz;
 use crate::Peripheral;