Removed obsolete benchmark

tests/ImageSharp.Benchmarks/Codecs/Jpeg/EncodeJpegMultiple.cs

@@ -1,34 +0,0 @@
-// Copyright (c) Six Labors.
-// Licensed under the Apache License, Version 2.0.
-
-using System.Collections.Generic;
-using System.Drawing.Imaging;
-using BenchmarkDotNet.Attributes;
-using SixLabors.ImageSharp.Formats.Jpeg;
-
-namespace SixLabors.ImageSharp.Benchmarks.Codecs.Jpeg
-{
-    [Config(typeof(Config.ShortMultiFramework))]
-    public class EncodeJpegMultiple : MultiImageBenchmarkBase.WithImagesPreloaded
-    {
-        protected override IEnumerable<string> InputImageSubfoldersOrFiles => new[] { "Bmp/", "Jpg/baseline" };
-
-        protected override IEnumerable<string> SearchPatterns => new[] { "*.bmp", "*.jpg" };
-
-        [Benchmark(Description = "EncodeJpegMultiple - ImageSharp")]
-        public void EncodeJpegImageSharp()
-            => this.ForEachImageSharpImage((img, ms) =>
-            {
-                img.Save(ms, new JpegEncoder());
-                return null;
-            });
-
-        [Benchmark(Baseline = true, Description = "EncodeJpegMultiple - System.Drawing")]
-        public void EncodeJpegSystemDrawing()
-            => this.ForEachSystemDrawingImage((img, ms) =>
-            {
-                img.Save(ms, ImageFormat.Jpeg);
-                return null;
-            });
-    }
-}