Removing directory from repository - where is its record kept?

[Harry Putnam]

The cvs manual tells up we can't really remove directories from our
repository but then goes on to tell how to do it.  First advice is to
cvs remove the files then just ignore the directory.

Well I took the other approach.  The one that isn't advocated...
First delete then cvs remove any file in a directory. and cvs remove
them.

Then cd $CVSROOT and remove the directory.

Now when I run cvs update I get a message that the deleted directroy
cannot be found.  So thinking to edit the source of that message.

I enter $CVSROOT/CVSROOT and look for that entry.

   grep '/directory' *
The only mention is in the history file.  And that isn't the source.

Back in the checked out module that used to contain that directory, I
look in the parent CVS/Entries and delete the name there.

Still it comes up.  Where is this information coming from?
Where does cvs keep its list of what it in the directory?

Update message: 
    cvs update: cannot open directory
    /usr/local/cvsroot/209/home/reader/t/var/proc: No such file or
    directory