Deleting Saved Search Restrictions

How do I delete saved searches? Or the search restrictions?

I have a lot of outdated ones that I want to delete. I checked under search in Preferences, I checked in the Virtual Library tabs, I can't seem to find a way to clear out saved searches.

I did opt to delete the saved searches in Preferences in Search, but it didn't delete anything, so I am guessing that it was for something else