That depends...
If you are getting a male and have no intention of getting him a bondmate in the future, then neutering may not be necessary. However, if, as he grows, his hormones have too much effect on him, you may decide then to go ahead and neuter. Some rabbits exhibit lots of undesirable hormonal behaviors including aggression, forgetting potty habits and spraying urine about. Those, clearly, would make one want to neuter. But other rabbits don't have any noticeable behavior changes.
If you are getting a female, I'd encourage spaying. The chance of an intact doe getting cancer by age 5 is considered quite high.