The localization support is broken and appears unused.
There is no google hits on the update-po-config target.
And there is no recent (5 years) activity related to the localization.

So lets just drop this as it is no longer used.

Suggested-by: Ulf Magnusson
Suggested-by: Masahiro Yamada
Signed-off-by: Sam Ravnborg
Signed-off-by: Masahiro Yamada