Remove SafeRegistryHandle (#18597)

src/System.Management.Automation/namespaces/SafeRegistryHandle.cs

@@ -1,53 +0,0 @@
-// Copyright (c) Microsoft Corporation.
-// Licensed under the MIT License.
-
-//
-// NOTE: A vast majority of this code was copied from BCL in
-// Namespace: Microsoft.Win32.SafeHandles
-//
-/*============================================================
-**
-**
-**
-** A wrapper for registry handles
-**
-**
-===========================================================*/
-
-using System;
-using System.Management.Automation;
-using System.Security;
-using System.Runtime.InteropServices;
-using System.Runtime.Versioning;
-using Microsoft.Win32.SafeHandles;
-using System.Runtime.ConstrainedExecution;
-using System.Security.Permissions;
-
-namespace Microsoft.PowerShell.Commands.Internal
-{
-    internal sealed class SafeRegistryHandle : SafeHandleZeroOrMinusOneIsInvalid
-    {
-        // Note: Officially -1 is the recommended invalid handle value for
-        // registry keys, but we'll also get back 0 as an invalid handle from
-        // RegOpenKeyEx.
-
-        internal SafeRegistryHandle() : base(true) { }
-
-        internal SafeRegistryHandle(IntPtr preexistingHandle, bool ownsHandle) : base(ownsHandle)
-        {
-            SetHandle(preexistingHandle);
-        }
-
-        [DllImport(PinvokeDllNames.RegCloseKeyDllName),
-         SuppressUnmanagedCodeSecurity,
-         ResourceExposure(ResourceScope.None)]
-        internal static extern int RegCloseKey(IntPtr hKey);
-
-        protected override bool ReleaseHandle()
-        {
-            // Returns a Win32 error code, 0 for success
-            int r = RegCloseKey(handle);
-            return r == 0;
-        }
-    }
-}