Hi,
When you are using the console, you are entering as an Owner in a room. So, as long as you remain logged in the console , you will see the owner. The 'Remove User' isn't enabled because you are still in console. So, You can remove any other user but not yourself.
I don't think there is a way to remove 'owner' from server side as long as the console is open and you are logged in. If you try from server side, most likely you will get errors in the console and won't be able to use the console anymore.
Hope this helps
Thanks
Hironmay Basu