7.5 -> drestroy user

if you destroy a user with a repo appear 500 error NoMethodError (undefined method xmlschema' for nil:NilClass): app/services/system_hooks_service.rb:21:in build_event_data' app/services/system_hooks_service.rb:3:in execute_hooks_for' app/models/members/project_member.rb:138:in post_destroy_hook' app/controllers/admin/users_controller.rb:92:in `destroy'