Purpose of "Delete Unused Form" link in reports

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I can't figure out why this link sometimes appears next to a form in the dashboard reports panel - and what happens if you click it? It deleted the form from the page, or does it just delete the results?

hursey013
 
chunksmurray replied on at Permalink Reply
chunksmurray
I think it appears when the form the report was linked to is removed. So this link just removes the report from the dashboard.
hursey013 replied on at Permalink Reply
hursey013
Thats what I was thinking, but I didn't remove the form. I did however modify one of the fields within the form - perhaps its a bug?