Once you have added a device as an asset, you can simply remove it as an asset in two ways.
First method will be by going to the Asset Management module and choosing the asset from your list of and clicking on the Delete button ().
Next method will need you to use the My Network module and go through your list of devices. Once you found the device you will need to remove from your asset list, click Edit ().
A popup window will appear then click Remove from Asset List button to proceed.