diff --git a/src/qibotn/MPSContractionHelper.py b/src/qibotn/MPSContractionHelper.py
index 3bf1106..b4ac366 100644
--- a/src/qibotn/MPSContractionHelper.py
+++ b/src/qibotn/MPSContractionHelper.py
@@ -99,7 +99,6 @@ class MPSContractionHelper:
         interleaved_inputs = []
         extra_mode = 3 * self.num_qubits + 2
         operator_modes = [None] * len(qubits) + [self.bra_modes[q][1] for q in qubits]
-        #qubits = list(qubits)
         qubits = [q for q in qubits]
         for i, o in enumerate(mps_tensors):
             interleaved_inputs.extend([o, self.bra_modes[i]])