To uninstall bwm-ng just follow these instructions.
/ubuntu/yakkety/universe///install/index.html small and simple console-based bandwidth monitor Ubuntu 16.10 universe/net 0.6-3.2build1
sudo apt-get remove bwm-ng
Which will remove just the bwm-ng package itself.
sudo apt-get remove --auto-remove bwm-ng
This will remove the bwm-ng package and any other dependant packages which are no longer needed.
If you also want to delete your local/config files for bwm-ng then this will work.
sudo apt-get purge bwm-ng
Or similarly, like this bwm-ng
sudo apt-get purge --auto-remove bwm-ng
|Description||small and simple console-based bandwidth monitor|