We don't let localizers translate platforms (bug 378328) so it shouldn't show up in the Progress Summary on the right side and it shouldn't be a part of the Overall Completeness Percentage calculation.
Removed from the localizer dashboard and stats calculations. If you want to access it now (as an admin), enter the URL. r59093
Verified FIXED on https://preview.addons.mozilla.org/en-US/localizers/de and https://preview.addons.mozilla.org/en-US/localizers/fr