openrc: fix double-assignment to dir

This one is a bit odd, it didn't get fixed in e273b4e08e,
and goes all the way back to cb9da6a262.

src/openrc/rc.c

@@ -505,7 +505,6 @@ runlevel_config(const char *service, const char *level)
 	char *conf, *dir;
 	bool retval;
 
-	dir = dirname(init);
 	dir = dirname(init);
 	xasprintf(&conf, "%s/conf.d/%s.%s", dir, service, level);
 	retval = exists(conf);