Revert inadvertent addition of empty file...

This partially reverts commit aca77864.

src/ExpressionEvaluator/CSharp/Test/ExpressionCompiler/DynamicViewTests.cs

-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace Microsoft.CodeAnalysis.CSharp.UnitTests
-{
-    public class DynamicViewTests
-    {
-    }
-
-
-}