Remove unused Sort extension methods from CollectionExtensions

Co-authored-by: baywet <[email protected]>

Author: Copilot

src/Microsoft.OpenApi/Extensions/CollectionExtensions.cs

@@ -1,50 +1,9 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-
-namespace Microsoft.OpenApi
+namespace Microsoft.OpenApi
 {
     /// <summary>
     /// Dictionary extension methods
     /// </summary>
     internal static class CollectionExtensions
     {
-        /// <summary>
-        /// Returns a new dictionary with entries sorted by key using a custom comparer.
-        /// </summary>
-        internal static IDictionary<TKey, TValue> Sort<TKey, TValue>(
-            this IDictionary<TKey, TValue> source,
-            IComparer<TKey> comparer)
-            where TKey : notnull
-        {
-#if NET7_0_OR_GREATER
-            ArgumentNullException.ThrowIfNull(nameof(source));
-            ArgumentNullException.ThrowIfNull(nameof(comparer));
-#else
-            if (source == null)
-                throw new ArgumentNullException(nameof(source));
-            if (comparer == null)
-                throw new ArgumentNullException(nameof(comparer));
-#endif
-            return source.OrderBy(kvp => kvp.Key, comparer)
-                               .ToDictionary(kvp => kvp.Key, kvp => kvp.Value);
-        }
-
-        /// <summary>
-        /// Sorts any IEnumerable<T> using the specified comparer and returns a List</T>.
-        /// </summary>
-        internal static List<T> Sort<T>(this IEnumerable<T> source, IComparer<T> comparer)
-        {
-#if NET7_0_OR_GREATER
-        ArgumentNullException.ThrowIfNull(source);
-        ArgumentNullException.ThrowIfNull(comparer);
-#else
-            if (source == null)
-                throw new ArgumentNullException(nameof(source));
-            if (comparer == null)
-                throw new ArgumentNullException(nameof(comparer));
-#endif
-            return source.OrderBy(item => item, comparer).ToList();
-        }
     }
 }