Inconsistent naming for services that delete things
services master % g ls-files|grep destroy
destroy_group_service.rb
members/destroy_service.rb
milestones/destroy_service.rb
projects/destroy_service.rb
services master % g ls-files|grep delete
delete_branch_service.rb
delete_tag_service.rb
delete_user_service.rb
files/delete_service.rb
notes/delete_service.rb