First round of dead file removal

experimental/visual_studio_plugin/third_party/Microsoft.VisualStudio.Project/Automation/OANullProperty.cs

-/// Copyright (c) Microsoft Corporation.  All rights reserved.
-
-using System;
-using System.Runtime.InteropServices;
-
-namespace Microsoft.VisualStudio.Project.Automation
-{
-        /// <summary>
-        /// This object defines a so called null object that is returned as instead of null. This is because callers in VSCore usually crash if a null propery is returned for them.
-        /// </summary>
-        [CLSCompliant(false), ComVisible(true)]
-        public class OANullProperty : EnvDTE.Property
-        {
-                #region fields
-                private OAProperties parent;
-                #endregion
-
-                #region ctors
-
-                public OANullProperty(OAProperties parent)
-                {
-                        this.parent = parent;
-                }
-                #endregion
-
-                #region EnvDTE.Property
-
-                public object Application
-                {
-                        get { return String.Empty; }
-                }
-
-                public EnvDTE.Properties Collection
-                {
-                        get
-                        {
-                                //todo: EnvDTE.Property.Collection
-                                return this.parent;
-                        }
-                }
-
-                public EnvDTE.DTE DTE
-                {
-                        get { return null; }
-                }
-
-                public object get_IndexedValue(object index1, object index2, object index3, object index4)
-                {
-                        return String.Empty;
-                }
-
-                public void let_Value(object value)
-                {
-                        //todo: let_Value
-                }
-
-                public string Name
-                {
-                        get { return String.Empty; }
-                }
-
-                public short NumIndices
-                {
-                        get { return 0; }
-                }
-
-                public object Object
-                {
-                        get { return this.parent.Target; }
-                        set
-                        {
-                        }
-                }
-
-                public EnvDTE.Properties Parent
-                {
-                        get { return this.parent; }
-                }
-
-                public void set_IndexedValue(object index1, object index2, object index3, object index4, object value)
-                {
-
-                }
-
-                public object Value
-                {
-                        get { return String.Empty; }
-                        set { }
-                }
-                #endregion
-        }
-}