This macro will delete the entire paragraph (note: Word doesn't know much
about "lines", it's geared toward paragraphs, but in this case I suspect
they're the same thing) if the form field contains its default text
(whatever that is, whether "Ingredient" or any other text, or five
nonbreaking spaces if the default isn't set).

Sub CleanUp()
   Dim ffld As FormField

   If ActiveDocument.ProtectionType <> wdNoProtection Then
       ActiveDocument.Unprotect
   End If

   For Each ffld In ActiveDocument.FormFields
       With ffld
           If .Type = wdFieldFormTextInput Then
               If .Result = .TextInput.Default Then
                   .Range.Paragraphs(1).Range.Delete
               End If
           End If
       End With
   Next

   ActiveDocument.Protect Type:=wdAllowOnlyFormFields, _
       noreset:=True
End Sub