Delete the categories asigned a one product with web service

[gamdev]

I need to add categories but I need to delete the old categories assigned to that product. how I can do ?

i add categories:

$resources->associations->categories->addChild('category')->addChild('id', 2);
$resources->associations->categories->addChild('category')->addChild('id', 3);
$resources->associations->categories->addChild('category')->addChild('id', N);

 

But I need delete the old categries creates

 

Thanks for all!!

[Andrea T.]

Nothing?