docs: Prepare for new sub tree

See #11925

docs/content/en/functions/collections/Apply.md

@@ -1,26 +0,0 @@
----
-title: collections.Apply
-description: Returns a new collection with each element transformed by the given function.
-categories: []
-keywords: []
-action:
-  aliases: [apply]
-  related: []
-  returnType: '[]any'
-  signatures: [collections.Apply COLLECTION FUNCTION PARAM...]
-aliases: [/functions/apply]
----
-
-The `apply` function takes three or more arguments, depending on the function being applied to the collection elements.
-
-The first argument is the collection itself, the second argument is the function name, and the remaining arguments are passed to the function, with the string `"."` representing the collection element.
-
-```go-html-template
-{{ $s := slice "hello" "world" }}
-
-{{ $s = apply $s "strings.FirstUpper" "." }}
-{{ $s }} → [Hello World]
-
-{{ $s = apply $s "strings.Replace" "." "l" "_" }}
-{{ $s }} →  [He__o Wor_d]
-```