message: Delete split_codepoints
  Summary: Mostly equivalent to the function elems. Not in the Starlark standard and I can't find any uses of it, so kill it.
diff: @@ -755,7 +755,7 @@ pub(crate) fn global_functions(builder: &mut GlobalsBuilder) {
  /// # starlark::assert::all_true(r#"
  /// reversed(['a', 'b', 'c']) == ['c', 'b', 'a']
  /// reversed(range(5)) == [4, 3, 2, 1, 0]
  - /// reversed("stressed".split_codepoints()) == ["d", "e", "s", "s", "e", "r", "t", "s"]
  + /// reversed("stressed".elems()) == ["d", "e", "s", "s", "e", "r", "t", "s"]
  /// reversed({"one": 1, "two": 2}.keys()) == ["two", "one"]
  /// # "#);
  /// ```
  @@ -903,7 +903,7 @@ pub(crate) fn global_functions(builder: &mut GlobalsBuilder) {
  /// # starlark::assert::all_true(r#"
  /// zip() == []
  /// zip(range(5)) == [(0,), (1,), (2,), (3,), (4,)]
  - /// zip(range(5), "abc".split_codepoints()) == [(0, "a"), (1, "b"), (2, "c")]
  + /// zip(range(5), "abc".elems()) == [(0, "a"), (1, "b"), (2, "c")]
  /// # "#);
  /// ```
  fn zip(args: Vec<Value>) -> List<'v> {
  