diff --git a/lectures/laffer_adaptive.md b/lectures/laffer_adaptive.md
index 69bed3ee..44b219a3 100644
--- a/lectures/laffer_adaptive.md
+++ b/lectures/laffer_adaptive.md
@@ -171,8 +171,6 @@ from collections import namedtuple
 import numpy as np
 import matplotlib.pyplot as plt
 from matplotlib.ticker import MaxNLocator
-from matplotlib.cm import get_cmap
-from matplotlib.colors import to_rgba
 import matplotlib
 from scipy.optimize import root, fsolve
 ```