kconfig: drop localization support

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 <ulfalizer@gmail.com>
Suggested-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/scripts/kconfig/zconf.y b/scripts/kconfig/zconf.y
index ad6305b..8bfaaf8 100644
--- a/scripts/kconfig/zconf.y
+++ b/scripts/kconfig/zconf.y
@@ -546,7 +546,7 @@
 		modules_sym = sym_find( "n" );
 
 	tmp = rootmenu.prompt->text;
-	rootmenu.prompt->text = _(rootmenu.prompt->text);
+	rootmenu.prompt->text = rootmenu.prompt->text;
 	rootmenu.prompt->text = sym_expand_string_value(rootmenu.prompt->text);
 	free((char*)tmp);