I have posted this question before but the people who were kind enough to answer did not address the problem as posed and the post is now dry - i.e. no-one addressing it. So, I repost the question, hopefully clarifying my problem:
After recently upgrading from Ubuntu 18.04 to 20.04 I found icons on my desktop that were not there before - see attached screenshot. When using Gnome-Tweaks I can remove my personal folder and the Wastebasket but the others remain and I don't know how to remove them. I should be most grateful if someone could help. Thank you.