$ sudo apt-get remove ladr4-apps 

Uninstall ladr4-apps including dependent package

If you would like to remove ladr4-apps and it's dependent packages which are no longer needed from Ubuntu,

$ sudo apt-get remove --auto-remove ladr4-apps 

Use Purging ladr4-apps

If you use with purge options to ladr4-apps package all the configuration and dependent packages will be removed.

$ sudo apt-get purge ladr4-apps 

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 ladr4-apps 

See Also,