how to uninstall an app in ubuntu code example
Example 1: ubuntu apt uninstall
sudo apt-get remove <application_name>
Example 2: how to completely remove apps ubuntu package
$ sudo apt-get remove package-name
Example 3: how to completely remove apps ubuntu package
$ sudo apt-get purge package-name
Example 4: ubuntu remove application icon
remove application icon file from "/usr/share/applications" or "~/.local/share/applications".