docs: Prepare for new sub tree

See #11925

docs/content/en/methods/site/Sites.md

@@ -1,66 +0,0 @@
----
-title: Sites
-description: Returns a collection of all Site objects, one for each language, ordered by language weight.
-categories: []
-keywords: []
-action:
-  related: []
-  returnType: page.Sites
-  signatures: [SITE.Sites]
----
-
-With this site configuration:
-
-{{< code-toggle file=hugo >}}
-defaultContentLanguage = 'de'
-defaultContentLanguageInSubdir = false
-
-[languages.de]
-languageCode = 'de-DE'
-languageDirection = 'ltr'
-languageName = 'Deutsch'
-title = 'Projekt Dokumentation'
-weight = 1
-
-[languages.en]
-languageCode = 'en-US'
-languageDirection = 'ltr'
-languageName = 'English'
-title = 'Project Documentation'
-weight = 2
-{{< /code-toggle >}}
-
-This template:
-
-```go-html-template
-<ul>
-  {{ range .Site.Sites }}
-    <li><a href="{{ .Home.Permalink }}">{{ .Title }}</a></li>
-  {{ end }}
-</ul>
-```
-
-Produces a list of links to each home page:
-
-```html
-<ul>
-  <li><a href="https://example.org/de/">Projekt Dokumentation</a></li>
-  <li><a href="https://example.org/en/">Project Documentation</a></li>
-</ul>
-```
-
-To render a link to home page of the primary (first) language:
-
-```go-html-template
-{{ with .Site.Sites.First }}
-  <a href="{{ .Home.Permalink }}">{{ .Title }}</a>
-{{ end }}
-```
-
-This is equivalent to:
-
-```go-html-template
-{{ with index .Site.Sites 0 }}
-  <a href="{{ .Home.Permalink }}">{{ .Title }}</a>
-{{ end }}
-```