Remove unnecessary meta data on markdown files (#12)

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

docs/installation/from-binary.md

@@ -3,16 +3,8 @@ date: "2017-06-19T12:00:00+02:00"
 title: "Installation from binary"
 slug: "install-from-binary"
 sidebar_position: 15
-toc: false
-draft: false
 aliases:
   - /en-us/install-from-binary
-menu:
-  sidebar:
-    parent: "installation"
-    name: "From binary"
-    sidebar_position: 15
-    identifier: "install-from-binary"
 ---
 
 # Installation from binary