Unlink projects from the glossary, so that their translators stop getting
its terms. The glossary keeps every language that another linked project
uses or that has translations.

The request is all or nothing: if any project can't be unlinked, none
is. It names any number of projects; a project named twice counts once.
A project that doesn't exist in the glossary's organization gets a
404, and an archived project, or a project not linked to this
glossary, gets a 409; each error has a /data/{i} pointer to the
project. If any project doesn't exist, only the 404s are returned.

Only organization administrators can unlink projects, and only on a plan
that supports glossary upload.