I would also love to see this timeline history deletion option added. As per the May 2018 post it appears that a number of bugs still exist in timeline functionality and only today I turned everything off in privacy and chose clear everything and it still left a record of many of my documents greyed out searchable but not able to be deleted. For peace of mind on privacy it would be good to know CC can mop up and check and ensure nothing in history if a CC user chooses say a tickable option to delete
