You can uninstall CloudLinux Subsystem For Ubuntu by running the following command:

./ubuntu2cloudlinux.py --uninstall

In that case the script will:

• Remove the CloudLinux OS components which are installed on your system, choosing from the following list: lve, kmodlve-dkms, lve-utils, lve-stats, lvemanager, cagefs, alt-python, alt-php, db-governor.
• Remove configs for CloudLinux repositories for Ubuntu.
• Ask you to check for remaining packages from CloudLinux and manually reboot your system.