Remove unnecessary meta data on markdown files (#12)

Reviewed-on: https://gitea.com/gitea/docs/pulls/12

docs/development/integrations.md

@@ -3,16 +3,8 @@ date: "2019-04-15T17:29:00+08:00"
 title: "Integrations"
 slug: "integrations"
 sidebar_position: 65
-toc: false
-draft: false
 aliases:
   - /en-us/integrations
-menu:
-  sidebar:
-    parent: "development"
-    name: "Integrations"
-    sidebar_position: 65
-    identifier: "integrations"
 ---
 
 # Integrations