The Delete method deletes a specified data field. You can delete any data field except for Name and CDRStaticID. When you delete a field, you also delete all data entered for that field in the active document.
Examples:
The following VBA example deletes the data field named "Temporary" (assuming that this field has previously been created).
Sub Test()
ActiveDocument.DataFields.Add ("Temporary")
ActiveDocument.DataFields("Temporary").Delete
End Sub