I'm sure if the staff saw a reason to remove the board they would. It may not be in use now, but it's there for any possible future use.
It's always nice to have the option for just in case purposes...
Maybe we could instead bring more awareness to that particular board since more users like to roleplay are in need to find ones to roleplay with? They probably don't even know about the boards existence since more prefer to play in-game.
That's just my thought. If they ended up getting rid of it, they'll probably be a time where someone would probably suggest a similar idea and then they'll have to re-add, rewrite the rules, etc.