Snippet format update

To match the starter (for the migration)

snippets/remove.md

@@ -1,4 +1,7 @@
-### remove
+---
+title: remove
+tags: array,intermediate
+---
 
 Removes elements from an array for which the given function returns `false`.
 
@@ -17,4 +20,4 @@ const remove = (arr, func) =>
 
 ```js
 remove([1, 2, 3, 4], n => n % 2 === 0); // [2, 4]
-```
+```