Remove unused variable in sample documentation

`line` is actually declared later in `while let ...`, so this line is not necessary ``` warning: unused variable: `line` --> src/mpv.rs:125:9 | 125 | let mut line = String::new(); | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_line` ```
smol-rs · Apr 25, 2021 · 0dc0904 · 0dc0904
1 parent ace8e58
commit 0dc0904
Showing 1 changed file with 0 additions and 1 deletion.
diff --git a/src/io.rs b/src/io.rs
@@ -1465,7 1465,6 @@ pub trait AsyncBufReadExt: AsyncBufRead {
  /// let mut reader = BufReader::new(input);
  /// let mut lines = reader.lines();
  ///
- /// let mut line = String::new();
  /// while let Some(line) = lines.next().await {
  /// println!("{}", line?);
  /// }