Ok I updated to IOS 15.0 today. On my iPad it has added 4 items at the top, Clock, Calendar, preview photos and weather. I looked in the “Home Screen and Dock”, see attached photo, and could not find how to delete these new items.
Ignore my post above. I figured it out on how to get rid of the widgets. Just press on the widget for more than a second. A dialogue box will come up just like if you press on an app for more than 1 second.