help: Remove 0% translations

They haven't been updated for the help rewrite, and should *not* be added
back to HELP_LINGUAS without having been updated first. It's just a waste to
ship 0% translations.

(cherry picked from commit c73851a8d9cbc769d72be75f5cc19245a1c6523c)

Conflicts:
	help/fr/fr.po