How to delete files in /System/Library/Desktop Pictures on Catalina? I tried to delete files in the default desktop picture directory (/System/Library/Desktop Pictures) on macOS 10.15 Catalina with sudo permission but failed.

$ pwd
/System/Library/Desktop Pictures

$ sudo rm *.heic
Password:
rm: cannot remove 'Catalina Clouds.heic': Operation not permitted


Is there a hassle-free way to solve this problem?
As a general rule I do not recommend deleting system files, however, if you really want to remove the default wallpapers you can do the following:


Boot to macOS Recovery by pressing ⌘R when booting the Mac.
Using Terminal, from the Utilities menu, use the following commands:

cd /Volumes/Macintosh\ HD/System/Library/Desktop\ Pictures
rm *.heic
reboot