[TUHS] When did "man cal" lose the comment about 1752?

[Dave Horsfall]

The manpage for "cal" used to have the comment "Try September 1752" (and 
yes, I know why); it's no longer there, so when did it disappear?  The 
SysV fun police?

I remember it in Ed5 and Ed6, but can't remember when I last saw it.

Thanks.

-- Dave