I implemented a dialog in localechooser to warn users that switching
translations was no longer possible, but during testing found that
debconf/translations-dropped is set to true immediately after localechooser
(or probably any other component) has been run and not only after
translations have actually been dropped.

The template should only be set to true after anna has been run (at least,
according to commit r47699).

Because of this bug the dialog to warn users has been disabled for now.