libsaria: Don't auto-load songs passed on startup

I would rather have the front end program load the song rather than
assuming that everything should be loaded right away.  This also gives
front end programs a chance to register callbacks before loading.

libsaria/libsaria.cpp

@@ -4,8 +4,6 @@
 Libsaria::Libsaria(int argc, char **argv)
 {
 	audio.init(argc, argv);
-	if (argc > 1)
-		load(argv[1]);
 }
 
 Libsaria::~Libsaria()