diff --git a/skimage/feature/_brief.py b/skimage/feature/_brief.py
index facb28c0..23dc63ab 100644
--- a/skimage/feature/_brief.py
+++ b/skimage/feature/_brief.py
@@ -1,7 +1,6 @@
 import numpy as np
 from scipy.ndimage.filters import gaussian_filter
 
-from ..color import rgb2gray
 from ..util import img_as_float
 from .util import _remove_border_keypoints
 
diff --git a/skimage/feature/util.py b/skimage/feature/util.py
index 5747eb47..b634305b 100644
--- a/skimage/feature/util.py
+++ b/skimage/feature/util.py
@@ -3,8 +3,7 @@ from scipy.spatial.distance import hamming
 
 
 def _remove_border_keypoints(image, keypoints, dist):
-	"""Removes keypoints that are within dist pixels from the image border.
-	"""
+    """Removes keypoints that are within dist pixels from the image border."""
     width = image.shape[0]
     height = image.shape[1]