I also would like to remove some of the required fields, in my case just the phone number as I feel it's rather intrusive to ask for someone's phone. I've found a workaround of this problem -- in the Admin area, select Configuration > Minimum Values. For whatever field you wish not to require your users to enter, edit that and delete the number, leaving it blank. So instead of a number of characters, just leave it blank.

This is a workaround in that your users will be able to proceed without entering anything into that field. The only problem is the the red star that indicated "required" still appears. I'll bet there is a way to edit this out in the html doc though. Any ideas?