kconfig: remove unused PACKAGE definition

Commit 3b9fa0931d ("[PATCH] Kconfig i18n support") added this code,
and then commit ("kconfig: drop localization support") removed the
i18n support entirely.

Remove the left-over.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

scripts/kconfig/lkc.h

@@ -20,10 +20,6 @@ extern "C" {
 
 #define SRCTREE "srctree"
 
-#ifndef PACKAGE
-#define PACKAGE "linux"
-#endif
-
 #ifndef CONFIG_
 #define CONFIG_ "CONFIG_"
 #endif