I recently removed a content type which had a number of CCK fields which were shared with another content type.

As expected, CCK merged all those fields from the content_field_XYZ tables to a content_type_ABC table.

However, in the database I see that the content_field tables still exist in the database, each of which has only 2 records, for 2 NIDs which had been deleted at one point in time.

I'm thinking this might be related to this issue:
http://drupal.org/node/97861

However, this is different, in that the content_field_XYZ tables were never dropped.

Is there a function somewhere I can run to have CCK try again to clean up these old tables, or will I have to delete them by hand? Is there any way to confirm for sure that these tables are not being used before I manually nuke them?

Thanks!