Remove pooled Stopwatch

SharedStopwatch already offers a more efficient alternative.

src/Workspaces/SharedUtilitiesAndExtensions/Compiler/Core/ObjectPools/Extensions.cs

@@ -3,7 +3,6 @@
 // See the LICENSE file in the project root for more information.
 
 using System.Collections.Generic;
-using System.Diagnostics;
 using System.Text;
 using Microsoft.CodeAnalysis.PooledObjects;
 
@@ -16,9 +15,6 @@ internal static class SharedPoolExtensions
         public static PooledObject<StringBuilder> GetPooledObject(this ObjectPool<StringBuilder> pool)
             => PooledObject<StringBuilder>.Create(pool);
 
-        public static PooledObject<Stopwatch> GetPooledObject(this ObjectPool<Stopwatch> pool)
-            => PooledObject<Stopwatch>.Create(pool);
-
         public static PooledObject<Stack<TItem>> GetPooledObject<TItem>(this ObjectPool<Stack<TItem>> pool)
             => PooledObject<Stack<TItem>>.Create(pool);
 
@@ -52,14 +48,6 @@ public static StringBuilder AllocateAndClear(this ObjectPool<StringBuilder> pool
             return sb;
         }
 
-        public static Stopwatch AllocateAndClear(this ObjectPool<Stopwatch> pool)
-        {
-            var watch = pool.Allocate();
-            watch.Reset();
-
-            return watch;
-        }
-
         public static Stack<T> AllocateAndClear<T>(this ObjectPool<Stack<T>> pool)
         {
             var set = pool.Allocate();
@@ -117,17 +105,6 @@ public static void ClearAndFree(this ObjectPool<StringBuilder> pool, StringBuild
             pool.Free(sb);
         }
 
-        public static void ClearAndFree(this ObjectPool<Stopwatch> pool, Stopwatch watch)
-        {
-            if (watch == null)
-            {
-                return;
-            }
-
-            watch.Reset();
-            pool.Free(watch);
-        }
-
         public static void ClearAndFree<T>(this ObjectPool<HashSet<T>> pool, HashSet<T> set)
         {
             if (set == null)

src/Workspaces/SharedUtilitiesAndExtensions/Compiler/Core/ObjectPools/PooledObject.cs

@@ -4,7 +4,6 @@
 
 using System;
 using System.Collections.Generic;
-using System.Diagnostics;
 using System.Text;
 using Microsoft.CodeAnalysis.PooledObjects;
 
@@ -46,14 +45,6 @@ public static PooledObject<StringBuilder> Create(ObjectPool<StringBuilder> pool)
                 (p, sb) => Releaser(p, sb));
         }
 
-        public static PooledObject<Stopwatch> Create(ObjectPool<Stopwatch> pool)
-        {
-            return new PooledObject<Stopwatch>(
-                pool,
-                p => Allocator(p),
-                (p, sb) => Releaser(p, sb));
-        }
-
         public static PooledObject<Stack<TItem>> Create<TItem>(ObjectPool<Stack<TItem>> pool)
         {
             return new PooledObject<Stack<TItem>>(
@@ -102,12 +93,6 @@ private static StringBuilder Allocator(ObjectPool<StringBuilder> pool)
         private static void Releaser(ObjectPool<StringBuilder> pool, StringBuilder sb)
             => pool.ClearAndFree(sb);
 
-        private static Stopwatch Allocator(ObjectPool<Stopwatch> pool)
-            => pool.AllocateAndClear();
-
-        private static void Releaser(ObjectPool<Stopwatch> pool, Stopwatch sb)
-            => pool.ClearAndFree(sb);
-
         private static Stack<TItem> Allocator<TItem>(ObjectPool<Stack<TItem>> pool)
             => pool.AllocateAndClear();