docs: Prepare for new sub tree

See #11925

docs/content/en/methods/page/IsMenuCurrent.md

@@ -1,29 +0,0 @@
----
-title: IsMenuCurrent
-description: Reports whether the given page object matches the page object associated with the given menu entry in the given menu.
-categories: []
-keywords: []
-action:
-  related:
-    - methods/page/HasMenuCurrent
-  returnType: bool
-  signatures: [PAGE.IsMenuCurrent MENU MENUENTRY]
-aliases: [/functions/ismenucurrent]
----
-
-```go-html-template
-{{ $currentPage := . }}
-{{ range site.Menus.main }}
-  {{ if $currentPage.IsMenuCurrent .Menu . }}
-    <a class="active" aria-current="page" href="{{ .URL }}">{{ .Name }}</a>
-  {{ else if $currentPage.HasMenuCurrent .Menu . }}
-    <a class="ancestor" aria-current="true" href="{{ .URL }}">{{ .Name }}</a>
-  {{ else }}
-    <a href="{{ .URL }}">{{ .Name }}</a>
-  {{ end }}
-{{ end }}
-```
-
-See [menu templates] for a complete example.
-
-[menu templates]: /templates/menu-templates/#example