weird import

src/main.rs

@@ -32,7 +32,7 @@ mod app {
         packet::Packet,
         whisker::{Gps, Route},
     };
-    use stm32f4xx_hal::{self as hal};
+    use stm32f4xx_hal as hal;
     use systick_monotonic::{ExtU64, Systick};
     use usb_device::prelude::*;