Sorry. It was suggested that I look at APPS which I did but it wouldn't let me do anything other than add information which I was not prepared to do. Eventually I looked at my profile, found a different link to APPS and was able to delete it from there - with all the usual rubbish about "Do you really want to etc." I persisted (it makes you read all sorts of things) and eventually it took the hint and disappeared.
It really annoys me when things like that just appear and assume that you will be so overjoyed that you won't be able to think of life without them and won't therefore need to kow how to delete them.