The upgrade notification gets more and more intrusive day by day. Now there is no option to be "Reminded Tomorrow" or "Skip This" anymore.
Now one could just turn on "Do Not Disturb" feature from System Preferences between 00:01 and 23:59 (or something similar more suitable for the sleep pattern of the dear reader). However, there are still some notifications I'd love to see.
So, the question is: How to get rid of this particular notification (for good, preferably) ie. how to just use whatever I've got installed and not upgrade for the time being?