docs: Prepare for new sub tree

See #11925

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

@@ -1,39 +0,0 @@
----
-title: fmt.Printf
-description: Formats a string using the standard `fmt.Sprintf` function.
-categories: []
-keywords: []
-action:
-  aliases: [printf]
-  related:
-    - functions/fmt/Print
-    - functions/fmt/Println
-  returnType: string
-  signatures: ['fmt.Printf FORMAT [INPUT]']
-aliases: [/functions/printf]
----
-
-{{% include "functions/fmt/_common/fmt-layout.md" %}}
-
-```go-html-template
-{{ $var := "world" }}
-{{ printf "Hello %s." $var }} → Hello world.
-```
-
-```go-html-template
-{{ $pi := 3.14159265 }}
-{{ printf "Pi is approximately %.2f." $pi }} → 3.14
-```
-
-Use the `printf` function with the `safeHTMLAttr` function:
-
-```go-html-template
-{{ $desc := "Eat at Joe's" }}
-<meta name="description" {{ printf "content=%q" $desc | safeHTMLAttr }}>
-```
-
-Hugo renders this to:
-
-```html
-<meta name="description" content="Eat at Joe's">
-```