I did it by myself. I know a bit about debian. The tutorial was about Raspbian this is the reason it does not appear into the tutorial. For OSMC it is required. flickrfs is no longer supported, you’re right I am wasting my time. I also checked others tools but I was unable to have them work properly.
To be honest have the possibility to manage photo directly from OSMC would have been great but I think it’s not easy. However, the thread was about the Raspbian/OSMC cmpatibility.
I removed the line as suggested. If someone else on this forum have OSMC in sync with Flickr in some way I would appreciate any help. Otherwise I think this thread can be considered closed.