Mention cutdown on Python legacy code

Author: jakirkham

_posts/2019-05-02-zarr-2.3-release.md

@@ -153,7 +153,8 @@ Thanks to some under-the-hood changes in Numcodecs 0.6 and Zarr 2.3, the buffer
 protocol is now cleanly supported for Python 2/3 in both libraries when working
 with data. In addition to improved memory handling and performance, this should
 make it easier for users developing their own stores, compressors, and filters
-to use with Zarr.
+to use with Zarr. Also it has cutdown on the amount of code specialized for
+handling different Python versions.
 
 ## Future developments