How can I hide my signature or my friends list, etc. in my profile? I used to be able to select "hidden" and everything was fine. What should I do now? I think I forgot a lot

Hiding profile sections is longer possible after the recent profile changes. The only way to "hide" your friends list is to remove all of your friends as far as I know.

I wasn't mainly talking about the friends list, but about generally "hiding" things from my profile. so it was removed. thank you for your reply.

Kind of, as far as I know this is currently the case:

Ladder Slasher section - always visible, even if you have no active characters
Signature and notes - always visible, even if empty
Friends list - only visible if you have friends added
Gaming and social section - only visible if you added info on it