Fix: categories divider in posts.
Fix: categories divider in posts.

If `created_at` and `updated_at` options set to `false`, excess divider before categories group will appear.
chaoskyme/hexo-theme-next,iissnan/hexo-theme-next,cragod/hexo-theme-next,geekrainy/hexo-theme-next,ganyuanda/hexo-theme-next,FluencyLiu/hexo-theme-next,chaoskyme/hexo-theme-next,Austaras/hexo-theme-next,mchsinx/hexo-theme-next