First round of dead file removal

experimental/visual_studio_plugin/src/MsiHelp/Program.cs

-using System;
-using System.Collections.Generic;
-using System.Diagnostics;
-using System.Linq;
-using System.Windows.Forms;
-
-namespace MsiHelp
-{
-  static class Program
-  {
-    /// <summary>
-    /// The main entry point for the application.
-    /// </summary>
-    [STAThread]
-    static int Main()
-    {
-      Application.EnableVisualStyles();
-      Application.SetCompatibleTextRenderingDefault(false);
-      MainForm mf = new MainForm();
-      Application.Run(mf);
-      return (int) mf.ResultCode;
-    }
-  }
-}