Remove Cpu_Ilp_RyuJit.cs because it's obsolete

samples/BenchmarkDotNet.Samples/CPU/Cpu_Ilp_RyuJit.cs

@@ -1,21 +0,0 @@
-using BenchmarkDotNet.Attributes;
-using BenchmarkDotNet.Attributes.Jobs;
-
-namespace BenchmarkDotNet.Samples.CPU
-{
-    // See: https://github.com/dotnet/coreclr/issues/993
-    [LegacyJitX64Job, RyuJitX64Job]
-    public class Cpu_Ilp_RyuJit
-    {
-        private double[] x = new double[11];
-
-        [Benchmark]
-        public double Calc()
-        {
-            double sum = 0.0;
-            for (int i = 1; i < x.Length; i++)
-                sum += 1.0 / (i * i) * x[i];
-            return sum;
-        }
-    }
-}