Remove unused code and add required code for MVVM

Wox/Helper/ListBoxItems.cs

@@ -1,71 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Collections.ObjectModel;
-using System.Collections.Specialized;
-using System.ComponentModel;
-using System.Linq;
-using Wox.Plugin;
-
-namespace Wox.Helper
-{
-    class ListBoxItems : ObservableCollection<Result>
-    // todo implement custom moveItem,removeItem,insertItem for better performance
-    {
-        public void RemoveAll(Predicate<Result> predicate)
-        {
-            CheckReentrancy();
-
-            List<Result> itemsToRemove = Items.Where(x => predicate(x)).ToList();
-            if (itemsToRemove.Count > 0)
-            {
-
-                itemsToRemove.ForEach(item => Items.Remove(item));
-
-                OnPropertyChanged(new PropertyChangedEventArgs("Count"));
-                OnPropertyChanged(new PropertyChangedEventArgs("Item[]"));
-                // fuck ms 
-                // http://blogs.msdn.com/b/nathannesbit/archive/2009/04/20/addrange-and-observablecollection.aspx
-                // http://geekswithblogs.net/NewThingsILearned/archive/2008/01/16/listcollectionviewcollectionview-doesnt-support-notifycollectionchanged-with-multiple-items.aspx
-                // PS: don't use Reset for other data updates, it will cause UI flickering
-                OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset));
-            }
-        }
-
-        public void Update(List<Result> newItems)
-        {
-            int newCount = newItems.Count;
-            int oldCount = Items.Count;
-            int location = newCount > oldCount ? oldCount : newCount;
-            for (int i = 0; i < location; i++)
-            {
-                Result oldItem = Items[i];
-                Result newItem = newItems[i];
-                if (!oldItem.Equals(newItem))
-                {
-                    this[i] = newItem;
-                }
-                else if (oldItem.Score != newItem.Score)
-                {
-                    this[i].Score = newItem.Score;
-                }
-            }
-
-            if (newCount > oldCount)
-            {
-                for (int i = oldCount; i < newCount; i++)
-                {
-                    Add(newItems[i]);
-                }
-            }
-            else
-            {
-                int removeIndex = newCount;
-                for (int i = newCount; i < oldCount; i++)
-                {
-                    RemoveAt(removeIndex);
-                }
-            }
-
-        }
-    }
-}