When you tap on the message it directs you to the Facebook page and asking you to login. This is a misleading notification as this message has nothing to do with Facebook app. It’s actually coming from SNS (Social Networking Service) app that is pre-installed on Galaxy phones that Samsung uses it to sync social network information with some other apps.
To disable it follow these steps:
- Go to Settings > Application Manger > All
- Find SNS app that has Facebook logo and tap on it
- Tap on Force Stop and then Turn off
That’s it. This message should no longer appear.