remove unused github buttons.js.
diff --git a/_jade/en/index.jade b/_jade/en/index.jade
index deac027..5dface1 100644
--- a/_jade/en/index.jade
+++ b/_jade/en/index.jade
@@ -142,4 +142,4 @@
 block extra_js
     script(src='https://cdn.jsdelivr.net/npm/vanilla-lazyload@12.0.0/dist/lazyload.min.js')
     script(src='#{cdnPayRoot}/#{ecWWWLang}/js/index.js?_v_=#{homeVersion}')
-    <script async defer src="https://buttons.github.io/buttons.js"></script>
+    //- <script async defer src="https://buttons.github.io/buttons.js"></script>
diff --git a/_jade/zh/index.jade b/_jade/zh/index.jade
index ae80fc8..9239e4d 100644
--- a/_jade/zh/index.jade
+++ b/_jade/zh/index.jade
@@ -150,7 +150,7 @@
 block extra_js
     script(src='https://cdn.jsdelivr.net/npm/vanilla-lazyload@12.0.0/dist/lazyload.min.js')
     script(src='#{cdnPayRoot}/#{ecWWWLang}/js/index.js?_v_=#{homeVersion}')
-    <script async defer src="https://buttons.github.io/buttons.js"></script>
+    //- <script async defer src="https://buttons.github.io/buttons.js"></script>
 
     script.
         window.lazyLoadOptions = {