diff --git a/quacc/dataset.py b/quacc/dataset.py
index 8098966..a844b82 100644
--- a/quacc/dataset.py
+++ b/quacc/dataset.py
@@ -1,4 +1,3 @@
-from operator import index
 from typing import Tuple
 import numpy as np
 from quapy.data.base import LabelledCollection