You can uninstall or removes an installed liblablgtksourceview2-ocaml-q9 package itself from Debian 8 (Jessie) through the terminal,
$ sudo apt-get remove liblablgtksourceview2-ocaml-q9
If you would like to remove liblablgtksourceview2-ocaml-q9 and it's dependent packages which are no longer needed from Ubuntu,
$ sudo apt-get remove --auto-remove liblablgtksourceview2-ocaml-q9
If you use with purge options to liblablgtksourceview2-ocaml-q9 package all the configuration and dependent packages will be removed.
$ sudo apt-get purge liblablgtksourceview2-ocaml-q9
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 liblablgtksourceview2-ocaml-q9