Fixed warnings

src/ImageSharp/Formats/Jpeg/Components/Quantization.cs

@@ -2,9 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
-using System.Collections.Generic;
 using System.Runtime.CompilerServices;
-using System.Text;
 
 namespace SixLabors.ImageSharp.Formats.Jpeg.Components
 {
@@ -87,8 +85,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components
         /// </remarks>
         /// <param name="table">Input quantization table.</param>
         /// <param name="target">Quantization to estimate against.</param>
-        /// <param name="quality">Estimated quality</param>
-        /// <returns><see cref="bool"/> indicating if given table is target-complient</returns>
+        /// <returns>Estimated quality</returns>
         public static int EstimateQuality(ref Block8x8F table, ReadOnlySpan<byte> target)
         {
             // This method can be SIMD'ified if standard table is injected as Block8x8F.
@@ -152,8 +149,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components
         /// Estimates jpeg quality based on quantization table in zig-zag order.
         /// </summary>
         /// <param name="luminanceTable">Luminance quantization table.</param>
-        /// <param name="quality">Output jpeg quality.</param>
-        /// <returns><see cref="bool"/> indicating if given table is ITU-complient.</returns>
+        /// <returns>Estimated quality</returns>
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public static int EstimateLuminanceQuality(ref Block8x8F luminanceTable)
             => EstimateQuality(ref luminanceTable, UnscaledQuant_Luminance);
@@ -162,8 +158,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components
         /// Estimates jpeg quality based on quantization table in zig-zag order.
         /// </summary>
         /// <param name="chrominanceTable">Chrominance quantization table.</param>
-        /// <param name="quality">Output jpeg quality.</param>
-        /// <returns><see cref="bool"/> indicating if given table is ITU-complient.</returns>
+        /// <returns>Estimated quality</returns>
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public static int EstimateChrominanceQuality(ref Block8x8F chrominanceTable)
             => EstimateQuality(ref chrominanceTable, UnscaledQuant_Chrominance);

src/ImageSharp/Formats/Jpeg/JpegDecoder.cs

@@ -4,8 +4,6 @@
 using System.IO;
 using System.Threading;
 using System.Threading.Tasks;
-using SixLabors.ImageSharp.IO;
-using SixLabors.ImageSharp.Memory;
 using SixLabors.ImageSharp.PixelFormats;
 
 namespace SixLabors.ImageSharp.Formats.Jpeg

tests/ImageSharp.Tests/Formats/Jpg/QuantizationTests.cs

@@ -1,10 +1,8 @@
 // Copyright (c) Six Labors.
 // Licensed under the Apache License, Version 2.0.
 
-using System;
 using SixLabors.ImageSharp.Formats.Jpeg.Components;
 using Xunit;
-using Xunit.Abstractions;
 
 using JpegQuantization = SixLabors.ImageSharp.Formats.Jpeg.Components.Quantization;
 

tests/ImageSharp.Tests/Formats/Jpg/SpectralJpegTests.cs

@@ -4,7 +4,6 @@
 using System;
 using System.IO;
 using System.Linq;
-using System.Threading;
 using SixLabors.ImageSharp.Formats.Jpeg;
 using SixLabors.ImageSharp.Formats.Jpeg.Components;
 using SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder;