How to uninstall or remove flashplugin-installer software package from Ubuntu 16.04 LTS (Xenial Xerus)

You can uninstall or removes an installed flashplugin-installer package itself from Ubuntu 16.04 LTS (Xenial Xerus) through the terminal,

$ sudo apt-get remove flashplugin-installer

Uninstall flashplugin-installer including dependent package

If you would like to remove flashplugin-installer and it's dependent packages which are no longer needed from Ubuntu,

$ sudo apt-get remove --auto-remove flashplugin-installer

Use Purging flashplugin-installer

If you use with purge options to flashplugin-installer package all the configuration and dependent packages will be removed.

$ sudo apt-get purge flashplugin-installer

If you use purge options along with auto remove, will be removed everything regarding the package, It's really useful when you want to reinstall again.

$ sudo apt-get purge --auto-remove flashplugin-installer