revert accidental push to release/2.1.x

Author: antonfirsov

src/ImageSharp/Formats/Gif/LzwDecoder.cs

@@ -317,17 +317,5 @@ public void IssueTooLargeLzwBits<TPixel>(TestImageProvider<TPixel> provider)
             image.DebugSaveMultiFrame(provider);
             image.CompareToReferenceOutputMultiFrame(provider, ImageComparer.Exact);
         }
-
-        // https://github.com/SixLabors/ImageSharp/issues/2859
-        [Theory]
-        [WithFile(TestImages.Gif.Issues.Issue2859_A, PixelTypes.Rgba32)]
-        [WithFile(TestImages.Gif.Issues.Issue2859_B, PixelTypes.Rgba32)]
-        public void Issue2859_LZWPixelStackOverflow<TPixel>(TestImageProvider<TPixel> provider)
-            where TPixel : unmanaged, IPixel<TPixel>
-        {
-            using Image<TPixel> image = provider.GetImage();
-            image.DebugSaveMultiFrame(provider);
-            image.CompareToReferenceOutputMultiFrame(provider, ImageComparer.Exact);
-        }
     }
 }

tests/ImageSharp.Tests/Formats/Gif/GifDecoderTests.cs

@@ -464,9 +464,7 @@ public static class Issues
                 public const string Issue1962NoColorTable = "Gif/issues/issue1962_tiniest_gif_1st.gif";
                 public const string Issue2012EmptyXmp = "Gif/issues/issue2012_Stronghold-Crusader-Extreme-Cover.gif";
                 public const string Issue2012BadMinCode = "Gif/issues/issue2012_drona1.gif";
-                public const string Issue2758 = "Gif/issues/issue_2758.gif";
-                public const string Issue2859_A = "Gif/issues/issue_2859_A.gif";
-                public const string Issue2859_B = "Gif/issues/issue_2859_B.gif";
+            public const string Issue2758 = "Gif/issues/issue_2758.gif";
             }
 
             public static readonly string[] All = { Rings, Giphy, Cheers, Trans, Kumin, Leo, Ratio4x1, Ratio1x4 };