SHELL

apt remove ppa

sudo add-apt-repository --remove ppa:dhor/myway

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

delete ppa repository ubuntu

sudo add-apt-repository --remove ppa:PPA_Name/ppa