Remove PSES force event handling hook

Author: rjmholt

PSReadLine/ReadLine.cs

@@ -197,7 +197,6 @@ internal static PSKeyInfo ReadKey()
                     //   - a key is pressed
                     //   - the console is exiting
                     //   - 300ms - to process events if we're idle
-                    //   - processing of events is requested externally
                     //   - ReadLine cancellation is requested externally
                     handleId = WaitHandle.WaitAny(_singleton._requestKeyWaitHandles, 300);
                     if (handleId != WaitHandle.WaitTimeout && handleId != EventProcessingRequested)
@@ -650,10 +649,6 @@ private PSConsoleReadLine()
             _savedCurrentLine = new HistoryItem();
             _queuedKeys = new Queue<PSKeyInfo>();
 
-            // Initialize this event handler early because it could be used by PowerShell
-            // Editor Services before 'DelayedOneTimeInitialize' runs.
-            _forceEventWaitHandle = new AutoResetEvent(false);
-
             string hostName = null;
             // This works mostly by luck - we're not doing anything to guarantee the constructor for our
             // singleton is called on a thread with a runspace, but it is happening by coincidence.
@@ -838,7 +833,7 @@ private void DelayedOneTimeInitialize()
             _singleton._readKeyWaitHandle = new AutoResetEvent(false);
             _singleton._keyReadWaitHandle = new AutoResetEvent(false);
             _singleton._closingWaitHandle = new ManualResetEvent(false);
-            _singleton._requestKeyWaitHandles = new WaitHandle[] {_singleton._keyReadWaitHandle, _singleton._closingWaitHandle, _defaultCancellationToken.WaitHandle, _singleton._forceEventWaitHandle};
+            _singleton._requestKeyWaitHandles = new WaitHandle[] {_singleton._keyReadWaitHandle, _singleton._closingWaitHandle, _defaultCancellationToken.WaitHandle};
             _singleton._threadProcWaitHandles = new WaitHandle[] {_singleton._readKeyWaitHandle, _singleton._closingWaitHandle};
 
             // This is for a "being hosted in an alternate appdomain scenario" (the
@@ -858,17 +853,6 @@ private void DelayedOneTimeInitialize()
             _singleton._readKeyThread.Start();
         }
 
-        /// <summary>
-        /// Used by PowerShellEditorServices to force immediate
-        /// event handling during the <see cref="PSConsoleReadLine.ReadKey" />
-        /// method. This is not a public API, but it is part of a private contract
-        /// with that project.
-        /// </summary>
-        private static void ForcePSEventHandling()
-        {
-            _singleton._forceEventWaitHandle.Set();
-        }
-
         private static void Chord(ConsoleKeyInfo? key = null, object arg = null)
         {
             if (!key.HasValue)