fix clippy warnings

src/peripherals/storage/flash_store.rs

@@ -21,9 +21,7 @@ impl Error for FlashStoreError {}
 
 impl Display for FlashStoreError {
     fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
-        match self {
-            err => write!(f, "FlashStoreError:\n{:?}", err.0),
-        }
+        write!(f, "FlashStoreError:\n{:?}", self.0)
     }
 }