cleanup: remove unnecessary StoreProgress clone()

src/backup/datastore.rs

@@ -760,7 +760,7 @@ impl DataStore {
     }
 }
 
-#[derive(Debug, Clone, Default)]
+#[derive(Debug, Default)]
 /// Tracker for progress of operations iterating over `Datastore` contents.
 pub struct StoreProgress {
     /// Completed groups