FS-10690: [libblade] Undid apple definition for old libconfig stuff

libs/libblade/src/include/blade.h

@@ -70,11 +70,6 @@ KS_BEGIN_EXTERN_C
 #define config_setting_lookup config_lookup_from
 #endif
 
-#ifdef __APPLE__
-// @todo temp support for Mac comes with 1.6
-#define config_lookup_from config_setting_lookup
-#endif
-
 KS_DECLARE(ks_status_t) blade_init(void);
 KS_DECLARE(ks_status_t) blade_shutdown(void);