Benchmark: cleanup conditional compiling after dropping netcoreapp1.1 target

src/Benchmark/Providers.cs

@@ -28,7 +28,6 @@ namespace Benchmark
                 case Provider.Managed:
                     Control.UseManaged();
                     break;
-#if !NETCOREAPP1_1
                 case Provider.NativeMKLAutoHigh:
                     Control.UseNativeMKL(MklConsistency.Auto, MklPrecision.Double, MklAccuracy.High);
                     break;
@@ -44,7 +43,6 @@ namespace Benchmark
                 case Provider.NativeOpenBLAS:
                     Control.UseNativeOpenBLAS();
                     break;
-#endif
                 default:
                     throw new NotSupportedException($"Provider {provider} not supported.");
             }

src/Benchmark/Transforms/FFT.cs

@@ -36,11 +36,7 @@ namespace Benchmark.Transforms
         [Params(32)] //, 128, 64, 1024, 8192, 65536)]
         public int N { get; set; }
 
-#if NETCOREAPP1_1
-        [Params(Provider.Managed)]
-#else
         [Params(Provider.Managed, Provider.NativeMKLAutoHigh)]
-#endif
         public Provider Provider { get; set; }
 
         Complex[] _data;