Afaik, only lamps have no shadows option, found in the lamp tab settings. Objects using emission are not lamps so the option is missing.
I fiddled around with this, and the point is it takes a while to setup to make it approximately match the nonfake version. You’ll also have to render out the nonfake version first just to keep it as a reference for tuning the fake stuff. And the fake version might be noisier because it requires more (area) lights.
Here is the real version of a table lamp on some shiny tiles:
And here is the fake version; “not in shadow area” under the lamp is deliberate to show this is something you’ll have to consider. A couple of area lamps are also glossy visible, indicating this is also something you have to consider.
Screenshot. The righmost white tab is what is creating the “not in shadow area” part. The shade itself is just math nodes describing fake lighting values and “shadows” of the bars inside - it’s just a conical mesh with nothing inside (except the base).
Btw, the selected light is an actual spot light inside the lamp so I could control the shadow from the lamp base itself. The rest of the lights, although named spot, are actually rectangular area lights in a circular array.
I would not use this for anything though.