Board Thread:Skyrim/@comment-11403529-20130727211659/@comment-6881629-20130728132005

You can sometimes do it by disabling and messing around with the quest but thats not really a good idea, if you want to get rid of quest items stuck in you inventory (i know i do...) try -

player.drop (Item ID) 1

Or

player.removeitem (Item ID) 1