I had generated a mail merge document which I linked to an Excel table.
I have since decided to remove the mail merge feature from this
document. I deleted all the data fields that point to the Excel table.
However, when I open the document, I still get a message that the data
source is being opened, and if I press the merge button, it still spits
out several copies of the base document, even though there are no
variable fields.  How can I disconnect this data source from the
document so that I don't get this message any more?