Remove macro to free locale

This functionality can now be handled automatically because locale can
now be freed seaparately from obs_module_unload with
obs_module_free_locale, which is called automatically when the module is
being freed.

plugins/linux-xcomposite/plugin-main.cpp

@@ -94,7 +94,5 @@ void obs_module_unload()
 {
 	XCompcapMain::deinit();
 
-	OBS_MODULE_FREE_DEFAULT_LOCALE();
-
 	blog(LOG_INFO, "Xcomposite capture plugin unloaded");
 }