Hello all, I propose to remove `org.apache.james.mailbox.acl.GroupMembershipResolver` , `SimpleGroupMembershipResolver` and related implement.
Reason: - Interface GroupMembershipResolver has only one implement is SimpleGroupMembershipResolver As the author's comment: "There is no persistence. You will get only what you add". And nowhere in James call to `.addMemberShip` method => `.isMember` always return FALSE. Remove the exuberancy code to make it simpler. Regards, Tung Tran Van
