cPanel is a leading hosting control panel and it is being used by many web hosting provider. cPanel can manage your entire server and all services i.e. DNS, web service, FTP, email server etc.
When you install a cPanel on your server, it updates system binaries as well and it make lots of changes on your server. It also installs additional binaries and software on your server.
Since it updates system binaries and adds lots of other binaries, it is impossible to uninstall cPanel from your server. That means, if you wish to remove cPanel control panel, you cannot do it without fresh rebuild. Also, there is no uninstaller available from cPanel as well. If you wish to remove cPanel, you will have to secure full data from your server and then you will have to reinstall operating system.