I love that we can attach a file to a record in salesforce but how do you UN - attach it?   

The screenshot attached is an example in a custom object of ours.   I attached an incorrect file - OOPS! - now I want to attach the correct one BUT the only way to get rid of the wrong one in my mind is to delete it?   It's a useful salesforce file and used by other users elsewhere - the issue is I just attached it by mistake.   Am I missing something?   Is there actually a way I can unassociated it with this record?

@* Lightning Now! *