To delete a Qualys Containerized Scanner Appliance:
Navigate to Scans > Appliances.
For a containerized scanner appliance you want to update, point your cursor on the appliance and select the more options arrow > Delete.
OR
Select the Containerized Scanner Appliance you want to update. Its details are displayed in the Preview section. In Preview, click Actions > Delete.
In the Delete Containerized Scanner window, click Delete.
In the Warning window, click Delete. The scanner appliance is deleted.