docs: Prepare for new sub tree

See #11925

docs/content/en/functions/safe/JS.md

@@ -1,26 +0,0 @@
----
-title: safe.JS
-description: Declares the given string as a safe JavaScript expression.
-categories: []
-keywords: []
-action:
-  aliases: [safeJS]
-  related:
-    - functions/safe/CSS
-    - functions/safe/HTML
-    - functions/safe/HTMLAttr
-    - functions/safe/JSStr
-    - functions/safe/URL
-  returnType: template.JS
-  signatures: [safe.JS INPUT]
-aliases: [/functions/safejs]
----
-
-In this context, *safe* means the string encapsulates a known safe EcmaScript5 Expression (e.g., `(x + y * z())`).
-
-Template authors are responsible for ensuring that typed expressions do not break the intended precedence and that there is no statement/expression ambiguity as when passing an expression like `{ foo:bar() }\n['foo']()`, which is both a valid expression and a valid program with a very different meaning.
-
-Example: Given `hash = "619c16f"` defined in the front matter of your `.md` file:
-
-* `<script>var form_{{ .Params.hash | safeJS }};…</script>` &rarr; `<script>var form_619c16f;…</script>`
-* `<script>var form_{{ .Params.hash }};…</script>` &rarr; `<script>var form_"619c16f";…</script>`