docs: Prepare for new sub tree

See #11925

docs/content/en/functions/fmt/Println.md

@@ -1,18 +0,0 @@
----
-title: fmt.Println
-description: Prints the default representation of the given argument using the standard `fmt.Print` function and enforces a line break.
-categories: []
-keywords: []
-action:
-  aliases: [println]
-  related:
-    - functions/fmt/Print
-    - functions/fmt/Printf
-  returnType: string
-  signatures: [fmt.Println INPUT]
-aliases: [/functions/println]
----
-
-```go-html-template
-{{ println "foo" }} → foo\n
-```