AP_Scripting: Hide lua IO for now

libraries/AP_Scripting/lua/src/linit.c

@@ -44,7 +44,7 @@ static const luaL_Reg loadedlibs[] = {
   {LUA_LOADLIBNAME, luaopen_package},
   {LUA_COLIBNAME, luaopen_coroutine},
   {LUA_TABLIBNAME, luaopen_table},
-  {LUA_IOLIBNAME, luaopen_io},
+//  {LUA_IOLIBNAME, luaopen_io},
   {LUA_OSLIBNAME, luaopen_os},
   {LUA_STRLIBNAME, luaopen_string},
   {LUA_MATHLIBNAME, luaopen_math},

libraries/AP_Scripting/lua/src/liolib.c

@@ -1,3 +1,4 @@
+#if 0
 /*
 ** $Id: liolib.c,v 2.151.1.1 2017/04/19 17:29:57 roberto Exp $
 ** Standard I/O (and system) library
@@ -774,3 +775,4 @@ LUAMOD_API int luaopen_io (lua_State *L) {
   return 1;
 }
 
+#endif