diff --git a/src/Microsoft.AspNetCore.Authentication/Win32.cs b/src/Microsoft.AspNetCore.Authentication/Win32.cs
deleted file mode 100644
index 8752c3b734..0000000000
--- a/src/Microsoft.AspNetCore.Authentication/Win32.cs
+++ /dev/null
@@ -1,96 +0,0 @@
-// Copyright (c) .NET Foundation. All rights reserved.
-// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
-
-
-using System;
-using System.Runtime.InteropServices;
-
-namespace Microsoft.Win32
-{
-    // TODO: ? [Localizable(false)]
-    internal static class NativeMethods
-    {
-        // ReSharper disable InconsistentNaming
-        public const int X509_ASN_ENCODING = 0x00000001;
-        public const int X509_PUBLIC_KEY_INFO = 8;
-        // ReSharper restore InconsistentNaming
-
-        /// <summary>
-        /// Encodes a structure of the type indicated by the value of the lpszStructType parameter.
-        /// </summary>
-        /// <param name="dwCertEncodingType">Type of encoding used.</param>
-        /// <param name="lpszStructType">The high-order word is zero, the low-order word specifies the integer identifier for the type of the specified structure so
-        /// we can use the constants in http://msdn.microsoft.com/en-us/library/windows/desktop/aa378145%28v=vs.85%29.aspx</param>
-        /// <param name="pvStructInfo">A pointer to the structure to be encoded.</param>
-        /// <param name="pbEncoded">A pointer to a buffer to receive the encoded structure. This parameter can be NULL to retrieve the size of this information for memory allocation purposes.</param>
-        /// <param name="pcbEncoded">A pointer to a DWORD variable that contains the size, in bytes, of the buffer pointed to by the pbEncoded parameter.</param>
-        /// <returns></returns>
-        [DllImport("crypt32.dll", CharSet = CharSet.Ansi, SetLastError = true)]
-        [return: MarshalAs(UnmanagedType.Bool)]
-        internal static extern bool CryptEncodeObject(
-            UInt32 dwCertEncodingType,
-            IntPtr lpszStructType,
-            ref CERT_PUBLIC_KEY_INFO pvStructInfo,
-            byte[] pbEncoded,
-            ref UInt32 pcbEncoded);
-
-        // ReSharper disable InconsistentNaming
-        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
-        internal struct CRYPT_BLOB
-        {
-            public Int32 cbData;
-            public IntPtr pbData;
-        }
-
-        [StructLayout(LayoutKind.Sequential)]
-        internal struct CERT_CONTEXT
-        {
-            public Int32 dwCertEncodingType;
-            public IntPtr pbCertEncoded;
-            public Int32 cbCertEncoded;
-            public IntPtr pCertInfo;
-            public IntPtr hCertStore;
-        }
-
-        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
-        internal struct CRYPT_ALGORITHM_IDENTIFIER
-        {
-            public string pszObjId;
-            public CRYPT_BLOB Parameters;
-        }
-
-        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
-        internal struct CRYPT_BIT_BLOB
-        {
-            public Int32 cbData;
-            public IntPtr pbData;
-            public Int32 cUnusedBits;
-        }
-
-        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
-        internal struct CERT_PUBLIC_KEY_INFO
-        {
-            public CRYPT_ALGORITHM_IDENTIFIER Algorithm;
-            public CRYPT_BIT_BLOB PublicKey;
-        }
-
-        [StructLayout(LayoutKind.Sequential)]
-        internal class CERT_INFO
-        {
-            public Int32 dwVersion;
-            public CRYPT_BLOB SerialNumber;
-            public CRYPT_ALGORITHM_IDENTIFIER SignatureAlgorithm;
-            public CRYPT_BLOB Issuer;
-            public System.Runtime.InteropServices.ComTypes.FILETIME NotBefore;
-            public System.Runtime.InteropServices.ComTypes.FILETIME NotAfter;
-            public CRYPT_BLOB Subject;
-            public CERT_PUBLIC_KEY_INFO SubjectPublicKeyInfo;
-            public CRYPT_BIT_BLOB IssuerUniqueId;
-            public CRYPT_BIT_BLOB SubjectUniqueId;
-            public Int32 cExtension;
-            public IntPtr rgExtension;
-        }
-
-        // ReSharper restore InconsistentNaming
-    }
-}