remove hooks from objects

Remove the hooks we installed on objects in the destroy/free event
or before calling _destroy. This is not really needed but it is
a nice thing to do because it calls the hook removed callbacks.

src/modules/module-adapter/adapter.c

@@ -77,6 +77,7 @@ struct node {
 static void node_free(void *data)
 {
 	struct node *n = data;
+	spa_hook_remove(&n->node_listener);
 	pw_properties_free(n->props);
 }