Remove return value documentation for void return types.

src/ImageSharp/Formats/ImageExtensions.Save.cs

@@ -105,7 +105,6 @@ namespace SixLabors.ImageSharp
         /// <param name="stream">The stream to save the image to.</param>
         /// <param name="encoder">The encoder to save the image with.</param>
         /// <exception cref="System.ArgumentNullException">Thrown if the stream is null.</exception>
-        /// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
         public static void SaveAsBmp(this Image source, Stream stream, BmpEncoder encoder)
             => source.Save(
                 stream,
@@ -208,7 +207,6 @@ namespace SixLabors.ImageSharp
         /// <param name="stream">The stream to save the image to.</param>
         /// <param name="encoder">The encoder to save the image with.</param>
         /// <exception cref="System.ArgumentNullException">Thrown if the stream is null.</exception>
-        /// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
         public static void SaveAsGif(this Image source, Stream stream, GifEncoder encoder)
             => source.Save(
                 stream,
@@ -311,7 +309,6 @@ namespace SixLabors.ImageSharp
         /// <param name="stream">The stream to save the image to.</param>
         /// <param name="encoder">The encoder to save the image with.</param>
         /// <exception cref="System.ArgumentNullException">Thrown if the stream is null.</exception>
-        /// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
         public static void SaveAsJpeg(this Image source, Stream stream, JpegEncoder encoder)
             => source.Save(
                 stream,
@@ -414,7 +411,6 @@ namespace SixLabors.ImageSharp
         /// <param name="stream">The stream to save the image to.</param>
         /// <param name="encoder">The encoder to save the image with.</param>
         /// <exception cref="System.ArgumentNullException">Thrown if the stream is null.</exception>
-        /// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
         public static void SaveAsPbm(this Image source, Stream stream, PbmEncoder encoder)
             => source.Save(
                 stream,
@@ -517,7 +513,6 @@ namespace SixLabors.ImageSharp
         /// <param name="stream">The stream to save the image to.</param>
         /// <param name="encoder">The encoder to save the image with.</param>
         /// <exception cref="System.ArgumentNullException">Thrown if the stream is null.</exception>
-        /// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
         public static void SaveAsPng(this Image source, Stream stream, PngEncoder encoder)
             => source.Save(
                 stream,
@@ -620,7 +615,6 @@ namespace SixLabors.ImageSharp
         /// <param name="stream">The stream to save the image to.</param>
         /// <param name="encoder">The encoder to save the image with.</param>
         /// <exception cref="System.ArgumentNullException">Thrown if the stream is null.</exception>
-        /// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
         public static void SaveAsTga(this Image source, Stream stream, TgaEncoder encoder)
             => source.Save(
                 stream,
@@ -723,7 +717,6 @@ namespace SixLabors.ImageSharp
         /// <param name="stream">The stream to save the image to.</param>
         /// <param name="encoder">The encoder to save the image with.</param>
         /// <exception cref="System.ArgumentNullException">Thrown if the stream is null.</exception>
-        /// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
         public static void SaveAsWebp(this Image source, Stream stream, WebpEncoder encoder)
             => source.Save(
                 stream,
@@ -826,7 +819,6 @@ namespace SixLabors.ImageSharp
         /// <param name="stream">The stream to save the image to.</param>
         /// <param name="encoder">The encoder to save the image with.</param>
         /// <exception cref="System.ArgumentNullException">Thrown if the stream is null.</exception>
-        /// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
         public static void SaveAsTiff(this Image source, Stream stream, TiffEncoder encoder)
             => source.Save(
                 stream,

src/ImageSharp/Formats/ImageExtensions.Save.tt

@@ -124,7 +124,6 @@ namespace SixLabors.ImageSharp
         /// <param name="stream">The stream to save the image to.</param>
         /// <param name="encoder">The encoder to save the image with.</param>
         /// <exception cref="System.ArgumentNullException">Thrown if the stream is null.</exception>
-        /// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
         public static void SaveAs<#= fmt #>(this Image source, Stream stream, <#= fmt #>Encoder encoder)
             => source.Save(
                 stream,