Remove unnecessary meta data on markdown files (#12)

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

docs/installation/windows-service.md

@@ -3,17 +3,10 @@ date: "2016-12-21T15:00:00-02:00"
 title: "Register as a Windows service"
 slug: "windows-service"
 sidebar_position: 50
-toc: false
-draft: false
 aliases:
   - /en-us/windows-service
-menu:
-  sidebar:
-    parent: "installation"
-    name: "Windows Service"
-    sidebar_position: 50
-    identifier: "windows-service"
 ---
+
 # Register as a Windows service
 
 ## Prerequisites