The above feature is asking farmers to give Farmville permission to post directly to our wall instead of throwing a pop up on each item. This item could be handy if a person does a lot of posting through their farms. But for those who like to lock their posts, or share in a different way, it could be a problem. So if you deliberately or mistakenly agreed to the above, there is a way to remove the auto share.
With the on going changes on facebook layouts, below is the step by step on the latest facebook layout on how to remove one click/ auto share from farmville.