⚗️ Remove secondary menu settings

Now it does only support for Gemini theme, will be release next time.

exampleSite/config.yaml

@@ -135,39 +135,20 @@ menus:
       pre: user
       weight: 2
     - identifier: flinks
-      name: 友情链接
+      name: 站点示例
       pageref: /flinks.html
       pre: thumbs-up
       weight: 3
-    - identifier: example
-      name: 语法示例
-      pre: angles-down
-      weight: 4
-    - identifier: flow-charts
-      name: 流程图
-      pageref: /post/mermaid-charts.html
-      weight: 1
-      parent: example
-    - identifier: math
-      name: 数学公式
-      pageref: /post/math-formula.html
-      weight: 2   
-      parent: example
-    - identifier: syntax
-      name: 语法高亮
-      pageref: /post/syntax-highlighting.html
-      weight: 3   
-      parent: example
     - identifier: archives
       name: 归档
       pageref: /archives
       pre: archive
-      weight: 5
+      weight: 4
     - identifier: commonweal
       name: 公益 404
       url: /404.html
       pre: heartbeat
-      weight: 6
+      weight: 5
 
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 # Hugo NexT 主题参数配置