fixed leftover else branch

This fixes (removes) the leftover else branch that was part of an #ifdef that got deleted with the recent changes. I guess the smoketests don't even try to parse the unsupported module. Maybe it would be good to have some tests there that at least try to include the unsupported parts, i.e. they are unsupported, but we still might want to guarantee that at least including their headers into an empty file works.