The following comments explains why it was added, and that indeed it is no longer needed, as such.
jtv#851 (comment)

Note that neither of these 2 cmake modules are for public use, they are internal cmake stuff.
Nothing on the outside should use it. This was feedback given by kitware developers.

Revert "remove a use added for a purpose which is gone in the meantime."

This reverts commit 7fdd2f8.