$ sudo apt-get remove apbs 

Uninstall apbs including dependent package

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

$ sudo apt-get remove --auto-remove apbs 

Use Purging apbs

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

$ sudo apt-get purge apbs 

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 apbs 

See Also,