Remove "Expired" Projects from Individual's Favorites

I have many old projects and roles in my Favorites. Periodically, I check to see if those projects still exist. When I find one that has disappeared (the link takes me to the Open Projects list), I then return to my favorites page and delete both the project and the roles I had bookmarked.

It would be helpful if, when a project/role no longer has its own page, those project/roles disappeared from any linked Favorites.