diff --git a/doc/source/conf.py b/doc/source/conf.py
index 3ebc5d8b6333b..a4b7d97c2cf5e 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -315,7 +315,6 @@
    import numpy as np
    import pandas as pd
 
-   randn = np.random.randn
    np.random.seed(123456)
    np.set_printoptions(precision=4, suppress=True)
    pd.options.display.max_rows = 15