remove quantity

Is it possible to remove from the view of products the "quantity of products"?

I need this option does not appear for an entire product category.

Thank you very much from now.

Nicolas: I can not find the option that tells me. Could you tell me where it is? Thank you very much from now.

Nicolas: Thanks for your reply. There's your choice.

I make a query more: is there any way to disable the quantification only for a particular category?

Thank you very much in advance for your help.