Stop producing Microsoft.Extensions.Process.Sources

This was only used in the aspnet/AspNetCore repo. so the source for this project is moving to that repo
\n\nCommit migrated from 98522c18fb

src/Shared/Process/ProcessHelper.cs

@@ -1,113 +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.Collections.Generic;
-using System.Diagnostics;
-using System.IO;
-using System.Runtime.InteropServices;
-
-namespace Microsoft.Extensions.Internal
-{
-    internal static class ProcessExtensions
-    {
-        private static readonly bool _isWindows = RuntimeInformation.IsOSPlatform(OSPlatform.Windows);
-        private static readonly TimeSpan _defaultTimeout = TimeSpan.FromSeconds(30);
-
-        public static void KillTree(this Process process)
-        {
-            process.KillTree(_defaultTimeout);
-        }
-
-        public static void KillTree(this Process process, TimeSpan timeout)
-        {
-            string stdout;
-            if (_isWindows)
-            {
-                RunProcessAndWaitForExit(
-                    "taskkill",
-                    $"/T /F /PID {process.Id}",
-                    timeout,
-                    out stdout);
-            }
-            else
-            {
-                var children = new HashSet<int>();
-                GetAllChildIdsUnix(process.Id, children, timeout);
-                foreach (var childId in children)
-                {
-                    KillProcessUnix(childId, timeout);
-                }
-                KillProcessUnix(process.Id, timeout);
-            }
-        }
-
-        private static void GetAllChildIdsUnix(int parentId, ISet<int> children, TimeSpan timeout)
-        {
-            string stdout;
-            var exitCode = RunProcessAndWaitForExit(
-                "pgrep",
-                $"-P {parentId}",
-                timeout,
-                out stdout);
-
-            if (exitCode == 0 && !string.IsNullOrEmpty(stdout))
-            {
-                using (var reader = new StringReader(stdout))
-                {
-                    while (true)
-                    {
-                        var text = reader.ReadLine();
-                        if (text == null)
-                        {
-                            return;
-                        }
-
-                        int id;
-                        if (int.TryParse(text, out id))
-                        {
-                            children.Add(id);
-                            // Recursively get the children
-                            GetAllChildIdsUnix(id, children, timeout);
-                        }
-                    }
-                }
-            }
-        }
-
-        private static void KillProcessUnix(int processId, TimeSpan timeout)
-        {
-            string stdout;
-            RunProcessAndWaitForExit(
-                "kill",
-                $"-TERM {processId}",
-                timeout,
-                out stdout);
-        }
-
-        private static int RunProcessAndWaitForExit(string fileName, string arguments, TimeSpan timeout, out string stdout)
-        {
-            var startInfo = new ProcessStartInfo
-            {
-                FileName = fileName,
-                Arguments = arguments,
-                RedirectStandardOutput = true,
-                UseShellExecute = false
-            };
-
-            var process = Process.Start(startInfo);
-
-            stdout = null;
-            if (process.WaitForExit((int)timeout.TotalMilliseconds))
-            {
-                stdout = process.StandardOutput.ReadToEnd();
-            }
-            else
-            {
-                process.Kill();
-            }
-
-            return process.ExitCode;
-        }
-    }
-}