Remove dead code

Author: tmat

src/Workspaces/SharedUtilitiesAndExtensions/Workspace/Core/Simplification/SimplifierOptionsProviders.cs

@@ -66,7 +66,6 @@
     <Compile Include="$(MSBuildThisFileDirectory)Rename\Annotations\RenameNodeSimplificationAnnotation.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Rename\Annotations\RenameTokenSimplificationAnnotation.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Helpers\MefHostServicesHelpers.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)Simplification\SimplifierOptionsProviders.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Utilities\AsyncSymbolVisitor.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Utilities\AsyncSymbolVisitor`1.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Utilities\IProgressTracker.cs" />