MotherEarth25 Open Options > Game Options > Other, and disable Online Social Features. Quit the game and delete accountDataDB.package, inside Documents > Electronic Arts > The Sims 4. (This file contains data from your interim progress on the tasks but not the rewards you've earned.) When you reload the game, the Reaper icon and everything else that comes with the event should be gone.
I tried this as suggested and sure it worked for the one thing but now I can't use the gallery....So I can't mark this as a solution.
EA needs to give us the option to opt out of just these quests/rewards/weekly micro transaction bs... :(
