There was usually some option to sell buildings in previous games (can't remember much about 6 as didn't play it much but Google says you couldn't in 6) and it never became a meta cheese strategy...I am sure some people did it although there were usually restrictions such as only one building per turn and if you wanted to you could put simple restrictions like it would cost gold to destroy them or took a percentage of production to remover them.The problem with "canceling" building is that it would be incredibly easy to cancel all the buildings in every city that will be conquered soon. This would definitely become a meta "cheesy" annoying strategy.
The nearest the option became to being any sort of strategy was people often used to sell building in captured cities they were rasing which sounds pretty logical as you are 'looting' the city.