diff --git a/skimage/rank/percentile_rank.py b/skimage/rank/percentile_rank.py
index 2ed6f011..ac19ccd6 100644
--- a/skimage/rank/percentile_rank.py
+++ b/skimage/rank/percentile_rank.py
@@ -14,7 +14,6 @@ result image is 8 or 16 bit with respect to the input image
 
 """
 
-__docformat__ = 'restructuredtext en'
 
 import warnings
 from skimage import img_as_ubyte
diff --git a/skimage/rank/rank.py b/skimage/rank/rank.py
index 012c046f..51854128 100644
--- a/skimage/rank/rank.py
+++ b/skimage/rank/rank.py
@@ -12,7 +12,6 @@ result image is 8 or 16 bit with respect to the input image
 
 """
 
-__docformat__ = 'restructuredtext en'
 
 import warnings
 from skimage import img_as_ubyte