openpromfs; CONFIG_SUN_OPENPROMFS; used ?? or orphaned??

["Frans Meulenbroeks" <fransmeulenbroeks@gmail.com>]

While roaming through the fs tree I bumped upon the directory openpromfs

Is this one orphaned?
I saw that the Makefile references CONFIG_SUN_OPENPROMFS, but I could not find
it in a Kconfig file nor in the .config I generated (not even a
CONFIG_SUN_OPENPROMFS not set line).
(so either it does not exist, or my eyes are getting old).

As such it does not seem too useful (unless I am overlooking things):

Two options:
- add it to some Kconfig (and note I cannot do that, I have not the
faintest idea what it is, actually I got there out of curiosity).
- rm -rf openromfs