diff --git a/skimage/segmentation/random_walker_segmentation.py b/skimage/segmentation/random_walker_segmentation.py
index e71e7f09..9079dda9 100644
--- a/skimage/segmentation/random_walker_segmentation.py
+++ b/skimage/segmentation/random_walker_segmentation.py
@@ -9,8 +9,6 @@ significantly the performance.
 """
 
 import warnings
-import sys
-import os
 
 import numpy as np
 from scipy import sparse, ndimage