docs: Prepare for new sub tree

See #11925

docs/content/en/functions/path/Clean.md

@@ -1,33 +0,0 @@
----
-title: path.Clean
-description: Replaces path separators with slashes (`/`) and returns the shortest path name equivalent to the given path.
-categories: []
-keywords: []
-action:
-  aliases: []
-  related:
-    - functions/path/Base
-    - functions/path/BaseName
-    - functions/path/Dir
-    - functions/path/Ext
-    - functions/path/Join
-    - functions/path/Split
-  returnType: string
-  signatures: [path.Clean PATH]
-aliases: [/functions/path.clean]
----
-
-See Go's [`path.Clean`] documentation for details.
-
-[`path.Clean`]: https://pkg.go.dev/path#Clean
-
-```go-html-template
-{{ path.Clean "foo/bar" }} → foo/bar
-{{ path.Clean "/foo/bar" }} → /foo/bar
-{{ path.Clean "/foo/bar/" }} → /foo/bar
-{{ path.Clean "/foo//bar/" }} → /foo/bar
-{{ path.Clean "/foo/./bar/" }} → /foo/bar
-{{ path.Clean "/foo/../bar/" }} → /bar
-{{ path.Clean "/../foo/../bar/" }} → /bar
-{{ path.Clean "" }} → .
-```