Remove unused ListExtensions class

src/ImageSharp/Common/Extensions/ListExtensions.cs

@@ -1,46 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using System.Collections.Generic;
-
-namespace SixLabors.ImageSharp.Common.Extensions
-{
-    /// <summary>
-    /// Encapsulates a series of time saving extension methods to the <see cref="T:System.Collections.Generic.List"/> class.
-    /// </summary>
-    internal static class ListExtensions
-    {
-        /// <summary>
-        /// Inserts an item at the given index automatically expanding the capacity if required.
-        /// </summary>
-        /// <typeparam name="T">The type of object within the list</typeparam>
-        /// <param name="list">The list</param>
-        /// <param name="index">The index</param>
-        /// <param name="item">The item to insert</param>
-        public static void SafeInsert<T>(this List<T> list, int index, T item)
-        {
-            if (index >= list.Count)
-            {
-                list.Add(item);
-            }
-            else
-            {
-                list[index] = item;
-            }
-        }
-
-        /// <summary>
-        /// Removes the last element from a list and returns that element. This method changes the length of the list.
-        /// </summary>
-        /// <typeparam name="T">The type of object within the list</typeparam>
-        /// <param name="list">The list</param>
-        /// <returns>The last element in the specified sequence.</returns>
-        public static T Pop<T>(this List<T> list)
-        {
-            int last = list.Count - 1;
-            T item = list[last];
-            list.RemoveAt(last);
-            return item;
-        }
-    }
-}