$ sudo apt-get remove gqrx-sdr 

Uninstall gqrx-sdr including dependent package

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

$ sudo apt-get remove --auto-remove gqrx-sdr 

Use Purging gqrx-sdr

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

$ sudo apt-get purge gqrx-sdr 

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 gqrx-sdr 

See Also,