$ sudo apt-get remove netstat-nat 

Uninstall netstat-nat including dependent package

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

$ sudo apt-get remove --auto-remove netstat-nat 

Use Purging netstat-nat

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

$ sudo apt-get purge netstat-nat 

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 netstat-nat 

See Also,