DELETE /api/v2/qa/questions/{id}
仅拥有 [Q&A] Manage Questions 或者是问题发布者本人才有权限删除
[Q&A] Manage Questions
响应：
Status: 204 No Content
DELETE /api/v2/qa/answers/{id}
仅拥有 [Q&A] Manage Answers 或者是回答发布者本人才有权限删除
[Q&A] Manage Answers
