Removing old entity from mqtt broker

I have a battery sensor that tells me when xx battery is getting low. There is this entity that I think is no longer used that always shows the battery level at 21%. It is a 5-button controller from ikea.

sensor.computer_room_update_available_battery

Looking at my mqtt devices, the list of entities available for this device are below. I believe it is sensor.computer_room_battery. Can someone confirm if it is safe to remove the above from mqtt broker?