Removal is broken for now but you can likely Edit your screen to bury it at the bottom.

You can Unpin the Sonos Radio collections from the App Home Screen. 

For example for Sonos Radio Trending Now:

1. Tap the Arrow (>) to the right
2. Tap the three dots (...) in upper right 
3. Tap Unpin from home screen
4. Go back to home screen
5. Stop the app (on iPhone it’s a swipe up from the bottom)
6. Restart the app

To place them back:

1. Tap Sonos Radio icon on Home Screen
2. Find the group you want to place back on home screen
3. Tap the Arrow (>)
4. Tap three (...) dots
5. Tap Pin to Home Screen

Thank you for the replies. I’ve managed to get rid of the unwanted pinned items.

thanks