More unneeded file copying

build/Targets/Roslyn.Toolsets.Xunit.targets

@@ -18,14 +18,6 @@
 
     <RuntimeIdentifier Condition="'$(TargetFramework)' == 'net461' AND '$(RuntimeIdentifier)' == '' AND '$(OS)' == 'Windows_NT'">$(RoslynDesktopRuntimeIdentifier)</RuntimeIdentifier>
   </PropertyGroup>
-    
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp2.0'">
-    <Content Include="$(MicrosoftCSharpRefPath)\Microsoft.CSharp.dll">
-      <Link>ref/%(FileName)%(Extension)</Link>
-      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-      <Visible>false</Visible>
-    </Content>
-  </ItemGroup>
 
   <Target Name="Test" DependsOnTargets="Build">
     <MakeDir Directories="$(XUnitTestResultsDirectory)" />

build/Targets/Settings.props

@@ -58,8 +58,6 @@
     <IntermediateOutputPath>$(BaseIntermediateOutputPath)$(Configuration)</IntermediateOutputPath>
     <ArtifactsSymStoreDirectory Condition="'$(DeveloperBuild)' != 'true' and '$(OS)' == 'Windows_NT'">$(BaseOutputPath)$(Configuration)\SymStore\</ArtifactsSymStoreDirectory>
 
-    <MicrosoftCSharpRefPath>$(NuGetPackageRoot)/microsoft.csharp/$(MicrosoftCSharpVersion)/ref/netstandard1.0/</MicrosoftCSharpRefPath>
-
     <ToolsetPackagesSemaphore>$(ToolsetPackagesDir)toolsetpackages.semaphore</ToolsetPackagesSemaphore>
     <ToolsetCompilerPackageName Condition="'$(MSBuildRuntimeType)' != 'Core'">Microsoft.Net.Compilers</ToolsetCompilerPackageName>
     <ToolsetCompilerPackageName Condition="'$(MSBuildRuntimeType)' == 'Core'">Microsoft.NETCore.Compilers</ToolsetCompilerPackageName>