Apparently it's not possible to remove expired subscriptions from a My Norton account.
This means that every time I log in to My Norton I get a red warning message telling me that a subscription that I am never going to renew has expired and I can choose to renew the subscription or dismiss the message.
Next time I log in the message returns.
I guess that there may be a time limit in days on how long this irrelevant message will continue to show, but it's completely unnecessary and something that I should have control over.
It's not helpful.