Quest items (The Witcher 3: Wild Hunt)

Such a question, over time, some quest items do not move from the task tab, but remain there. Moreover, it is impossible not to throw out or sell them, and the quests associated with them have already been completed. So how to get rid of them, who knows? ... it’s not that it’s very annoying, it’s just that there are so many of them that your eyes run wide, all sorts of letters, books, figurines, etc.