diff --git a/src/qibotn/backends/quimb.py b/src/qibotn/backends/quimb.py
index 658ca7e..d948bf9 100644
--- a/src/qibotn/backends/quimb.py
+++ b/src/qibotn/backends/quimb.py
@@ -39,11 +39,9 @@ GATE_MAP = {
 }
 
 
-# class QuimbBackend(QibotnBackend, NumpyBackend):
 if not __name__ == "__main__":
 
     def __init__(self, engine="numpy"):
-        # uper().__init__()
         super(self.__class__, self).__init__()
 
         self.name = "qibotn"