I thought that `org-babel-sh-command' was still used if code blocks used the keyword "shell" as the language. If that's not the case and there really is no more use for `org-babel-sh-command', then please go ahead and apply this patch.
Thanks, -- Eric Schulte https://cs.unm.edu/~eschulte PGP: 0x614CA05D (see https://u.fsf.org/yw)