Hi Urmas,
I'm not sure about hiding but in case you no longer wanted to show that attribute, please see my comments below.
I'm not sure whether this trick will work for your requirement or not. But you can give a try if your attribute is custom created one.
over a period of time requirements change and I had to remove some required fields from one of my object sections - as you are aware we can't remove the required fields from the sections right? what i'll do at that time is
1. First I'll make that attribute as not required
2. Go to Object views and Remove the attribute from the all applicable section/s.
3. Make the attribute required again.
Best Regards
Jagadeesh