chore: remove unused clone for StoreRevMutDelta (#178)

firewood/src/storage/buffer.rs

@@ -809,7 +809,6 @@ mod tests {
         let wal_cfg = WalConfig::builder().build();
         let disk_requester = init_buffer(buf_cfg, wal_cfg);
 
-        // TODO: Run the test in a separate standalone directory for concurrency reasons
         let tmp_dir = TempDir::new("firewood").unwrap();
         let path = get_file_path(tmp_dir.path(), file!(), line!());
         let (root_db_path, reset) = crate::file::open_dir(path, true).unwrap();

firewood/src/storage/mod.rs

@@ -432,22 +432,6 @@ struct StoreRevMutDelta {
     plain: Ash,
 }
 
-impl Clone for StoreRevMutDelta {
-    fn clone(&self) -> Self {
-        let mut pages = HashMap::new();
-        for (pid, page) in self.pages.iter() {
-            let mut data = Box::new([0u8; PAGE_SIZE as usize]);
-            data.copy_from_slice(page.as_ref());
-            pages.insert(*pid, data);
-        }
-
-        Self {
-            pages,
-            plain: self.plain.clone(),
-        }
-    }
-}
-
 #[derive(Clone, Debug)]
 /// A mutable revision of the store. The view is constucted by applying the `deltas` to the
 /// `base space`. The `deltas` tracks both `undo` and `redo` to be able to rewind or reapply