Removed None defaults in rescale_intensity

TODO.txt

@@ -17,8 +17,3 @@ Version 0.14
   deprecation warning test for this alias.
 * Remove deprecated ``sigma_range`` kwargs in ``skimage.restoration.denoise_bilateral``
   and corresponding tests.
-
-
-Version 0.13
-------------
-* Remove deprecated `None` defaults for `skimage.exposure.rescale_intensity`

skimage/exposure/exposure.py

@@ -289,16 +289,6 @@ def rescale_intensity(image, in_range='image', out_range='dtype'):
     """
     dtype = image.dtype.type
 
-    if in_range is None:
-        in_range = 'image'
-        msg = "`in_range` should not be set to None. Use {!r} instead."
-        warn(msg.format(in_range))
-
-    if out_range is None:
-        out_range = 'dtype'
-        msg = "`out_range` should not be set to None. Use {!r} instead."
-        warn(msg.format(out_range))
-
     imin, imax = intensity_range(image, in_range)
     omin, omax = intensity_range(image, out_range, clip_negative=(imin >= 0))