$ sudo apt-get remove a2ps 

Uninstall a2ps including dependent package

If you would like to remove a2ps and it's dependent packages which are no longer needed from Ubuntu,

$ sudo apt-get remove --auto-remove a2ps 

Use Purging a2ps

If you use with purge options to a2ps package all the configuration and dependent packages will be removed.

$ sudo apt-get purge a2ps 

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 a2ps 

See Also,