how to remove a ppa debian code example
Example: remove ppa from ubuntu
sudo add-apt-repository --remove ppa:whatever/ppa
sudo apt-get install ppa-purge
sudo ppa-purge ppa:whatever/ppa
sudo apt-get purge package_name
sudo add-apt-repository --remove ppa:whatever/ppa
sudo apt-get install ppa-purge
sudo ppa-purge ppa:whatever/ppa
sudo apt-get purge package_name