What can you do if you want to get rid of your desks?
First, I didn't get rid of all my desks because once in a while students like an individual place to work.
Second, if you do decide to take the desks out of your classroom, don't have them removed from your school. Put your desks in storage instead in case your experiment does not work the way you expect. Also, if you happen to leave your school the next year, the teacher replacing you might appreciate having the desks put back in.
Third, don't remove the desks from your classroom unless you have a plan (a loose one even) of where you want kids to work. I had my risers (below) as my alternate learning furniture, but I also have long counters by the window and sink, rolling storage trolleys with counters on top, stand up easels and bulletin boards on which to write, the floor, small group tables (some collapsible, like a card table), etc.