lualoader: Fix up some luacheck concerns

- Garbage collect an unused (removed because it was useless) constant
- Don't bother with vararg notation if args will not be used

MFC after:	1 week

stand/lua/config.lua

@@ -45,7 +45,6 @@ local MSG_FAILOPENCFG = "Failed to open config: '%s'"
 local MSG_FAILREADCFG = "Failed to read config: '%s'"
 local MSG_FAILPARSECFG = "Failed to parse config: '%s'"
 local MSG_FAILEXBEF = "Failed to execute '%s' before loading '%s'"
-local MSG_FAILEXMOD = "Failed to execute '%s'"
 local MSG_FAILEXAF = "Failed to execute '%s' after loading '%s'"
 local MSG_MALFORMED = "Malformed line (%d):\n\t'%s'"
 local MSG_DEFAULTKERNFAIL = "No kernel set, failed to load from module_path"

stand/lua/menu.lua

@@ -494,7 +494,7 @@ function menu.autoboot(delay)
 end
 
 -- CLI commands
-function cli.menu(...)
+function cli.menu()
 	menu.run()
 end