$ sudo apt-get remove iw 

Uninstall iw including dependent package

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

$ sudo apt-get remove --auto-remove iw 

Use Purging iw

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

$ sudo apt-get purge iw 

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 iw 

See Also,