message: fix: Remove the deprecated type definitions of Png types
diff: @@ -31,17 +31,6 @@ pub struct PngReader<R: Read> {
  index: usize,
  }
  -/// PNG Reader
  -///
  -/// An alias of [`PngReader`].
  -///
  -/// TODO: remove
  -///
  -/// [`PngReader`]: struct.PngReader.html
  -#[allow(dead_code)]
  -#[deprecated(note = "Use `PngReader` instead")]
  -pub type PNGReader<R> = PngReader<R>;
  -
  impl<R: Read> PngReader<R> {
  fn new(mut reader: png::Reader<R>) -> ImageResult<PngReader<R>> {
  let len = reader.output_buffer_size();
  @@ -448,17 +437,6 @@ pub struct PngEncoder<W: Write> {
  filter: FilterType,
  }
  -/// PNG Encoder
  -///
  -/// An alias of [`PngEncoder`].
  -///
  -/// TODO: remove
  -///
  -/// [`PngEncoder`]: struct.PngEncoder.html
  -#[allow(dead_code)]
  -#[deprecated(note = "Use `PngEncoder` instead")]
  -pub type PNGEncoder<W> = PngEncoder<W>;
  -
  /// Compression level of a PNG encoder. The default setting is `Fast`.
  #[derive(Clone, Copy, Debug, Eq, PartialEq)]
  pub enum CompressionType {
  