From the 42nd draft of the ROTS script:

BAIL ORGANA: I'm placing these droids in your care. Treat them well. Clean them up. Have the Protocol Droid's mind wiped. Oh and while you're at it.. see all those people sitting watching this film? Have their minds wiped as well.

OBI-WAN WALKS BACK ON SCREEN, LOOKS DIRECTLY AT CAMERA, TOUCHES HIS INDEX FINGER TO HIS THUMB AND SLOWLY WAVES HIS HAND AT SCREEN.

OBI-WAN: You don't NEED to watch any further. These were NOT the prequels you were looking for. You never SAW any of them. Move along....