You can uninstall or removes an installed libcore-ocaml-rmbq0 package itself from Debian 7 (Wheezy) through the terminal,
$ sudo apt-get remove libcore-ocaml-rmbq0
If you would like to remove libcore-ocaml-rmbq0 and it's dependent packages which are no longer needed from Ubuntu,
$ sudo apt-get remove --auto-remove libcore-ocaml-rmbq0
If you use with purge options to libcore-ocaml-rmbq0 package all the configuration and dependent packages will be removed.
$ sudo apt-get purge libcore-ocaml-rmbq0
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 libcore-ocaml-rmbq0