I'm trying to disable app notification for a particular app. The usual method is to go to System > Apps > click on the app > uncheck the "show notifications" checkbox.
The problem is, this checkbox doesn't appear for this app, or for any of the random apps that I sampled which are installed on my phone (eg. GMail).
Am I missing something? I'm running a Samsung Galaxy (SGH-S730M) with Android 4.0.4. I found instructions (with screenshots) that look like they date back to Android OS 2.x or 1.6.