I have had many questions about how to get rid of the street lamps, which I succeeded doing with debug options turned on. The trick is to do it in live mode, not build/buy mode. I paused the game and went around deleting them. An even easier method is to use
Twallans Supercomputer. It has an option Maintenance/Object Stats/All, where you can see how many of each item you have in all hood. If you go through this list, you get to the street lamps. Cleanse them out, all, in one click. Done.
As I already told you, the deco stuff is trickier. Some of it CAN be cleaned out, though. Like hay bales. And the more modern, smaller tower thingies of wood and metal, which you can see here and there in Riverview. With Twallans Computer you can pick the option also, the pic is of a road sign, but if you cleanse it, it takes a away all that deco stuff (unfortunatley not the radio tower or the big water tower. Probably because those are build mode stuff.)
Beware that the stuff can't be put back.
You can also use one of these ready-cleansed hoods:
This one I cleansed of all buildings and sims by myself. No houses, no sims whatsoever. Start from scratch. No Buenavista buffs either - if you want those,
use this excellent program by TigerM at MTS to put the Buena Vista buffs where you want them.
This is a lamp cleansed version of
Bogsims Sunset Valley, which has the Buena Vista Buffs preserved.