how to remove apt gets in ubuntu code example

Example 1: how to remove an apt repository

sudo add-apt-repository --remove ppa:whatever/ppa
# or
sudo apt-add-repository --remove 'deb some/repo your_distro main'

Example 2: apt-get uninstall

sudo apt-get --purge autoremove pkg

Example 3: apt uninstall

sudo apt-get remove [pkg]