That's a very old incompatible change:

* Version 8.2

** Incompatible changes

*** =ob-sh.el= renamed to =ob-shell= This may require two changes in user
config.

1. In =org-babel-do-load-languages=, change =(sh . t)= to =(shell . t)=.

2. Edit =local.mk= files to change the value of =BTEST_OB_LANGUAGES= to
remove "sh" and include "shell".
http://orgmode.org/cgit.cgi/org-mode.git/plain/etc/ORG-NEWS


On Wed, Jul 12, 2017, 8:26 PM numbchild@gmail.com <numbchild@gmail.com>
wrote:

> RT
> I checked `ORG-NEWS` and git log history. Have not found this change in
> recent commits.
> Can someone explain this?
>
-- 

Kaushal Modi