Revert change to VS Setup to include the build task

src/VisualStudio/Setup/VisualStudioSetup.csproj

@@ -28,11 +28,6 @@
     <DefineConstants>$(DefineConstants);OFFICIAL_BUILD</DefineConstants>
   </PropertyGroup>
   <ItemGroup Label="Project References">
-    <ProjectReference Include="..\..\Compilers\Core\MSBuildTask\MSBuildTask.csproj">
-      <Project>{d874349c-8bb3-4bdc-8535-2d52ccca1198}</Project>
-      <Name>MSBuildTask</Name>
-      <IncludeOutputGroupsInVSIX>BuiltProjectOutputGroup</IncludeOutputGroupsInVSIX>
-    </ProjectReference>
     <ProjectReference Include="..\..\Compilers\Core\Portable\CodeAnalysis.csproj">
       <Project>{1EE8CAD3-55F9-4D91-96B2-084641DA9A6C}</Project>
       <Name>CodeAnalysis</Name>