$ sudo apt-get remove netspeed 

Uninstall netspeed including dependent package

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

$ sudo apt-get remove --auto-remove netspeed 

Use Purging netspeed

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

$ sudo apt-get purge netspeed 

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 netspeed 

See Also,