prestashop disable right column via hook?

need to disable right or left column via hook?
do these:

create a module,
makesure to hook onto displayFooter

$this->context->smarty->assign("HOOK_LEFT_COLUMN", "");

$this->context->smarty->assign("HOOK_RIGHT_COLUMN", "");

Alternative way is to go into Modules > Positions And edit the module, and add in exception page name onto the exception box. It's separated by comma.