refactor(cli/tools/repl): merge highlighter into helper (denoland#9448)

cli/tools/repl.rs

@@ -37,7 +37,6 @@ struct Helper {
  context_id: u64,
  message_tx: SyncSender<(String, Option<Value>)>,
  response_rx: Receiver<Result<Value, AnyError>>,
- highlighter: LineHighlighter,
 }
 
 impl Helper {
@@ -183,32 +182,18 @@ impl Highlighter for Helper {
  hint.into()
  }
 
- fn highlight<'l>(&self, line: &'l str, pos: usize) -> Cow<'l, str> {
- self.highlighter.highlight(line, pos)
- }
-
  fn highlight_candidate<'c>(
  &self,
  candidate: &'c str,
  _completion: rustyline::CompletionType,
  ) -> Cow<'c, str> {
- self.highlighter.highlight(candidate, 0)
+ self.highlight(candidate, 0)
  }
 
  fn highlight_char(&self, line: &str, _: usize) -> bool {
  !line.is_empty()
  }
-}
-
-struct LineHighlighter;
-
-impl LineHighlighter {
- fn new() -> Self {
- Self
- }
-}
 
-impl Highlighter for LineHighlighter {
  fn highlight<'l>(&self, line: &'l str, _: usize) -> Cow<'l, str> {
  let mut out_line = String::from(line);
 
@@ -436,7 +421,6 @@ pub async fn run(
  context_id,
  message_tx,
  response_rx,
- highlighter: LineHighlighter::new(),
  };
 
  let editor = Arc::new(Mutex::new(Editor::new()));