$ sudo apt-get remove keyutils 

Uninstall keyutils including dependent package

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

$ sudo apt-get remove --auto-remove keyutils 

Use Purging keyutils

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

$ sudo apt-get purge keyutils 

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 keyutils 

See Also,