diff --git a/cours/SIN/02-signaux.md b/cours/SIN/02-signaux.md
index 1a4929f..899f7cd 100644
--- a/cours/SIN/02-signaux.md
+++ b/cours/SIN/02-signaux.md
@@ -34,10 +34,7 @@ et un niveau **bas** ("Low").
 :tags: [remove-input]
 import altair as alt
 import pandas as pd
-import matplotlib.pyplot as plt
-import numpy as np
 import random
-from scipy.interpolate import CubicSpline
 
 random.seed(25)