Chopping jungles!

[crossclayton]

Could someone pls tell me how i can change it back to not being able to chop down jungles early on in the game?

I want to change jungle chopping back to the way it was in vanilla.

 

[Sonereal]

Could someone pls tell me how i can change it back to not being able to chop down jungles early on in the game?

I want to change jungle chopping back to the way it was in vanilla.

Aren't jungles cut with iron working? Because it's the same way in vanilla.