1 files changed, 0 insertions, 85 deletions
diff --git a/src/System.Private.CoreLib/src/System/Text/StringBuilderCache.cs b/src/System.Private.CoreLib/src/System/Text/StringBuilderCache.cs
deleted file mode 100644
index a1b1f50e3..000000000
--- a/src/System.Private.CoreLib/src/System/Text/StringBuilderCache.cs
+++ /dev/null
@@ -1,85 +0,0 @@
-// Licensed to the .NET Foundation under one or more agreements.
-// The .NET Foundation licenses this file to you under the MIT license.
-// See the LICENSE file in the project root for more information.
-
-/*============================================================
-**
-**
-** Purpose: provide a cached reusable instance of stringbuilder
-**          per thread  it's an optimisation that reduces the 
-**          number of instances constructed and collected.
-**
-**  Acquire - is used to get a string builder to use of a 
-**            particular size.  It can be called any number of 
-**            times, if a stringbuilder is in the cache then
-**            it will be returned and the cache emptied.
-**            subsequent calls will return a new stringbuilder.
-**
-**            A StringBuilder instance is cached in 
-**            Thread Local Storage and so there is one per thread
-**
-**  Release - Place the specified builder in the cache if it is 
-**            not too big.
-**            The stringbuilder should not be used after it has 
-**            been released.
-**            Unbalanced Releases are perfectly acceptable.  It
-**            will merely cause the runtime to create a new 
-**            stringbuilder next time Acquire is called.
-**
-**  GetStringAndRelease
-**          - ToString() the stringbuilder, Release it to the 
-**            cache and return the resulting string
-**
-===========================================================*/
-
-using System.Threading;
-
-namespace System.Text
-{
-    internal static class StringBuilderCache
-    {
-        private const int MAX_BUILDER_SIZE = 260;
-
-        // WARNING: We allow diagnostic tools to directly inspect this member (t_cachedInstance).
-        // See https://github.com/dotnet/corert/blob/master/Documentation/design-docs/diagnostics/diagnostics-tools-contract.md for more details. 
-        // Please do not change the type, the name, or the semantic usage of this member without understanding the implication for tools. 
-        // Get in touch with the diagnostics team if you have questions.
-        [ThreadStatic]
-        private static StringBuilder t_cachedInstance;
-
-        public static StringBuilder Acquire(int capacity = StringBuilder.DefaultCapacity)
-        {
-            if (capacity <= MAX_BUILDER_SIZE)
-            {
-                StringBuilder sb = StringBuilderCache.t_cachedInstance;
-                if (sb != null)
-                {
-                    // Avoid stringbuilder block fragmentation by getting a new StringBuilder
-                    // when the requested size is larger than the current capacity
-                    if (capacity <= sb.Capacity)
-                    {
-                        StringBuilderCache.t_cachedInstance = null;
-                        sb.Clear();
-                        return sb;
-                    }
-                }
-            }
-            return new StringBuilder(capacity);
-        }
-
-        public static void Release(StringBuilder sb)
-        {
-            if (sb.Capacity <= MAX_BUILDER_SIZE)
-            {
-                StringBuilderCache.t_cachedInstance = sb;
-            }
-        }
-
-        public static string GetStringAndRelease(StringBuilder sb)
-        {
-            string result = sb.ToString();
-            Release(sb);
-            return result;
-        }
-    }
-}