You can uninstall or removes an installed libcryptgps-ocaml-dev-fw4r8 package itself from Debian 8 (Jessie) through the terminal,
$ sudo apt-get remove libcryptgps-ocaml-dev-fw4r8
If you would like to remove libcryptgps-ocaml-dev-fw4r8 and it's dependent packages which are no longer needed from Ubuntu,
$ sudo apt-get remove --auto-remove libcryptgps-ocaml-dev-fw4r8
If you use with purge options to libcryptgps-ocaml-dev-fw4r8 package all the configuration and dependent packages will be removed.
$ sudo apt-get purge libcryptgps-ocaml-dev-fw4r8
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 libcryptgps-ocaml-dev-fw4r8