breaking changes: 精簡各評論的配置

fix: 修復footer 在部分瀏覽器沒有顯示在底部的 bug
improvement: 修改配置文件註釋

layout/includes/third-party/comments/gitalk.pug

@@ -15,11 +15,6 @@ script.
         owner: '!{theme.gitalk.owner}',
         admin: ['!{theme.gitalk.admin}'],
         id: '!{md5(page.path)}',
-        language: '!{theme.gitalk.language}',
-        perPage: !{theme.gitalk.perPage},
-        distractionFreeMode: !{theme.gitalk.distractionFreeMode},
-        pagerDirection: '!{theme.gitalk.pagerDirection}',
-        createIssueManually: !{theme.gitalk.createIssueManually},
         updateCountCallback: commentCount
       },!{JSON.stringify(theme.gitalk.option)}))