how to have a collection without Sandbox?

I would like to have a collection without Sandbox - I only want to have a “Live” mode.
How can I do that? I don’t see any thing in the Setting of my collection that support the operation I am looking for.

thanks

Solution
I was writing to the collection inside http-functions.js .
The code is a js function which is HTTP POST handler.
The URL I published to the caller included dev and that is what made the data goes to sandbox.