Cannot Manage Shared with Me content

I'm trying to clean up mine and serveral other users "Shared with Me" sections but there doesn't seem to be any way to revoke my own access from a report that's been shared with me. This is the case for reports that have been shared directly, but exist within a workspace that I do not have access to as well as reports that exist with somebody's personal "My Workspace".

I could certainly work with a tenant admin to chore our way through the first situation, but that's a waste of time and doesn't resolve the problem in the second situation. 

I believe the functionality used to exist where in the "Shared with Me" screen you could revoke your own access. Not sure if/when this was removed but it would be exactly what I'm looking for.