diff --git a/skimage/rank/_core.pxd b/skimage/rank/_core.pxd
index bb57aec4..fbae2b24 100644
--- a/skimage/rank/_core.pxd
+++ b/skimage/rank/_core.pxd
@@ -1,10 +1,3 @@
-""" to compile this use:
->>> python setup.py build_ext --inplace
-
-to generate html report use:
->>> cython -a core.pxd
-"""
-
 #cython: cdivision=True
 #cython: boundscheck=False
 #cython: nonecheck=False
diff --git a/skimage/rank/_core16p.pxd b/skimage/rank/_core16p.pxd
index 0d698cee..1ce9b4cd 100644
--- a/skimage/rank/_core16p.pxd
+++ b/skimage/rank/_core16p.pxd
@@ -1,10 +1,3 @@
-""" to compile this use:
->>> python setup.py build_ext --inplace
-
-to generate html report use:
->>> cython -a core16p.pxd
-"""
-
 #cython: cdivision=True
 #cython: boundscheck=False
 #cython: nonecheck=False
diff --git a/skimage/rank/_core8p.pxd b/skimage/rank/_core8p.pxd
index b878143e..9b4fbd29 100644
--- a/skimage/rank/_core8p.pxd
+++ b/skimage/rank/_core8p.pxd
@@ -1,10 +1,3 @@
-""" to compile this use:
->>> python setup.py build_ext --inplace
-
-to generate html report use:
->>> cython -a core8p.pxd
-"""
-
 #cython: cdivision=True
 #cython: boundscheck=False
 #cython: nonecheck=False
diff --git a/skimage/rank/_crank16_percentiles.pyx b/skimage/rank/_crank16_percentiles.pyx
index 6c67a54e..0f07196e 100644
--- a/skimage/rank/_crank16_percentiles.pyx
+++ b/skimage/rank/_crank16_percentiles.pyx
@@ -1,11 +1,3 @@
-""" to compile this use:
->>> python setup.py build_ext --inplace
-
-to generate html report use:
->>> cython -a crank_percentiles.pxd
-
-"""
-
 #cython: cdivision=True
 #cython: boundscheck=False
 #cython: nonecheck=False
diff --git a/skimage/rank/_crank8_percentiles.pyx b/skimage/rank/_crank8_percentiles.pyx
index 6b81c8bd..2299f04a 100644
--- a/skimage/rank/_crank8_percentiles.pyx
+++ b/skimage/rank/_crank8_percentiles.pyx
@@ -1,11 +1,3 @@
-""" to compile this use:
->>> python setup.py build_ext --inplace
-
-to generate html report use:
->>> cython -a crank_percentiles.pxd
-
-"""
-
 #cython: cdivision=True
 #cython: boundscheck=False
 #cython: nonecheck=False