You can uninstall or removes an installed libghc-parsec-dev-3.1.3-3d9ec package itself from Debian 8 (Jessie) through the terminal,
$ sudo apt-get remove libghc-parsec-dev-3.1.3-3d9ec
If you would like to remove libghc-parsec-dev-3.1.3-3d9ec and it's dependent packages which are no longer needed from Ubuntu,
$ sudo apt-get remove --auto-remove libghc-parsec-dev-3.1.3-3d9ec
If you use with purge options to libghc-parsec-dev-3.1.3-3d9ec package all the configuration and dependent packages will be removed.
$ sudo apt-get purge libghc-parsec-dev-3.1.3-3d9ec
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 libghc-parsec-dev-3.1.3-3d9ec