Thank you. Logged into my account via computer and accomplished the task as you described.
The reason I was so desperate to delete this scene is because my Alexa app bombs out every time I select "Smarthome". I deleted the scene in the kasa app and it was still showing in the Alexa app and I though this may be the reason for the bomb out. Alas, my Alexa app still bombs out when I select smarthome. The only way around the problem is to log out of the app and log in again. Smartome will be available until the next time I use the app.