I once ditched wizard and cleric for sorcerer and mystic, but I think thats not what you meant...
If your asking for parties without those four specific classes (like a barbarian, monk, bard, druid and warlock) I'd say there were a few out there.
If you mean a party that exists without filling all four roles (stealth, healing, blasting, combat) thats been done alot too. (Not having a cleric or a wizard on a party for example).
If you mean without any of those roles (no fighters or fighting types in the whole world) I'd say that is next to impossible. Even Star Wars and Wheel of Time have a class for those who deal in combat (soldier/armsmen) "magic" (jedi/channeler) and sneaky (scoundrel/Wanderer). While it is completely possible to have no caster classes (ask Josh Dyal about his campaign...) I'd think it would hard to explain away no fighters in the world.
Usually though, we end up with at least one of the four on the party though.