A Microsoft file hosting and synchronization service.
The steps you offered are no longer available in OneDrive. But I don't think your steps address the question, which was asking to be able to eliminate from OneDrive's "Photos" view online the "For You" section (because it includes privacy-busting histories of images in its "On this day"; "November moments"; and "Last week throughout the years" views).
The need isn't just to stop notifications, it's to prevent the "For You" photo collections from displaying at the top of the screen.