1 files changed, 0 insertions, 142 deletions
diff --git a/src/System.Private.CoreLib/shared/System/StringSpanHelpers.cs b/src/System.Private.CoreLib/shared/System/StringSpanHelpers.cs
deleted file mode 100644
index 9ddcc9450..000000000
--- a/src/System.Private.CoreLib/shared/System/StringSpanHelpers.cs
+++ /dev/null
@@ -1,142 +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.
-
-using System.Globalization;
-
-namespace System
-{
-    /// <summary>Helpers for string-like operations on spans of chars.</summary>
-    internal static class StringSpanHelpers
-    {
-        // TODO https://github.com/dotnet/corefx/issues/21395: Provide public, efficient implementations
-
-        public static bool Equals(this ReadOnlySpan<char> left, ReadOnlySpan<char> right, StringComparison comparisonType) =>
-            comparisonType == StringComparison.Ordinal ? Equals(left, right) :
-            comparisonType == StringComparison.OrdinalIgnoreCase ? EqualsOrdinalIgnoreCase(left, right) :
-            throw new ArgumentOutOfRangeException(nameof(comparisonType));
-
-        public static bool Equals(this ReadOnlySpan<char> left, string right) =>
-            Equals(left, right.AsSpan());
-
-        public static bool Equals(this ReadOnlySpan<char> left, ReadOnlySpan<char> right)
-        {
-            if (left.Length != right.Length)
-            {
-                return false;
-            }
-
-            for (int i = 0; i < left.Length; i++)
-            {
-                if (left[i] != right[i])
-                {
-                    return false;
-                }
-            }
-
-            return true;
-        }
-
-#if MONO
-        internal
-#endif
-        static bool EqualsOrdinalIgnoreCase(this ReadOnlySpan<char> left, ReadOnlySpan<char> right)
-        {
-            if (left.Length != right.Length)
-            {
-                return false;
-            }
-
-            for (int i = 0; i < left.Length; i++)
-            {
-                char x = left[i], y = right[i];
-                if (x != y &&
-                    TextInfo.ToUpperAsciiInvariant(x) != TextInfo.ToUpperAsciiInvariant(y))
-                {
-                    return false;
-                }
-            }
-
-            return true;
-        }
-
-        public static int IndexOf(this ReadOnlySpan<char> source, char value) =>
-            IndexOf(source, value, 0);
-
-        public static int IndexOf(this ReadOnlySpan<char> source, char value, int startIndex)
-        {
-            for (int i = startIndex; i < source.Length; i++)
-            {
-                if (source[i] == value)
-                {
-                    return i;
-                }
-            }
-
-            return -1;
-        }
-
-        public static bool Contains(this ReadOnlySpan<char> source, char value)
-        {
-            for (int i = 0; i < source.Length; i++)
-            {
-                if (source[i] == value)
-                {
-                    return true;
-                }
-            }
-
-            return false;
-        }
-
-        public static ReadOnlySpan<char> Remove(this ReadOnlySpan<char> source, int startIndex, int count)
-        {
-            if (startIndex < 0)
-                throw new ArgumentOutOfRangeException(nameof(startIndex), SR.ArgumentOutOfRange_StartIndex);
-            if (count < 0)
-                throw new ArgumentOutOfRangeException(nameof(count), SR.ArgumentOutOfRange_NegativeCount);
-            if (count > source.Length - startIndex)
-                throw new ArgumentOutOfRangeException(nameof(count), SR.ArgumentOutOfRange_IndexCount);
-
-            if (count == 0)
-            {
-                return source;
-            }
-
-            int newLength = source.Length - count;
-            if (newLength == 0)
-            {
-                return ReadOnlySpan<char>.Empty;
-            }
-
-            Span<char> result = new char[newLength];
-            source.Slice(0, startIndex).CopyTo(result);
-            source.Slice(startIndex + count).CopyTo(result.Slice(startIndex));
-            return result;
-        }
-
-        // Returns the index of the last occurrence of a specified character in the current instance.
-        public static int LastIndexOf(this ReadOnlySpan<char> source, char value)
-        {
-            if (source.Length == 0)
-                return -1;
-
-            for (int i = source.Length - 1; i >= 0; i--)
-            {
-                if (source[i] == value)
-                    return i;
-            }
-
-            return -1;
-        }
-
-        public static void CheckStringComparison(StringComparison comparisonType)
-        {
-            // Single comparison to check if comparisonType is within [CurrentCulture .. OrdinalIgnoreCase]
-            if ((uint)(comparisonType - StringComparison.CurrentCulture) > (StringComparison.OrdinalIgnoreCase - StringComparison.CurrentCulture))
-            {
-                throw new ArgumentException(SR.NotSupported_StringComparison, nameof(comparisonType));
-            }
-        }
-    }
-}