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