* The ``normed`` keyword argument has been removed from
  `np.histogram`, `np.histogram2d`, and `np.histogramdd`.
  Use ``density`` instead.  If ``normed`` was passed by
  position, ``density`` is now used.

Add release note for removal of ``normed=`` kwarg from histograms
DOC: Add release note for removal of ``normed=`` kwarg from histograms
