You can uninstall or removes an installed libjs-sink-test package itself from Debian 8 (Jessie) through the terminal,
$ sudo apt-get remove libjs-sink-test
If you would like to remove libjs-sink-test and it's dependent packages which are no longer needed from Ubuntu,
$ sudo apt-get remove --auto-remove libjs-sink-test
If you use with purge options to libjs-sink-test package all the configuration and dependent packages will be removed.
$ sudo apt-get purge libjs-sink-test
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 libjs-sink-test
I'm very pleased to share my working experience in the Linux field and have posted articles in this website — bits and pieces learned throughout my career.
