src/client/backup_writer.rs: reduce verbosity

src/client/backup_writer.rs

@@ -394,10 +394,11 @@ impl BackupWriter {
 
         while let Some(chunk) = stream.try_next().await? {
             let _ = flow_control.release_capacity(chunk.len());
-            println!("GOT DOWNLOAD {}", digest_to_hex(&chunk));
             known_chunks.lock().unwrap().insert(chunk);
         }
 
+        println!("known chunks list length: {}", known_chunks.lock().unwrap().len());
+
         Ok(())
     }