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As you can see, each app has a lot permissions to your Facebook account. Some of these permissions can be removed one-by-one (in this case, "Post to Facebook as me") but others are required for the app to function (in this case "Access my basic information" and "Send me email"). Click on Remove app in the top right corner.
Click on the blue Remove button.
Click on the blue Okay button. Do the same for all the other apps you want to remove.