Remove unused thread pool from standalone VM binary.

runtime/bin/main.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>
 
 #include "include/dart_api.h"
 #include "include/dart_debugger_api.h"
@@ skipping 522 matching lines @@
                      argv,
                      &vm_options,
                      &script_name,
                      &dart_options) < 0) {
     PrintUsage();
     return kErrorExitCode;
   }
 
   Dart_SetVMFlags(vm_options.count(), vm_options.arguments());
 
-  // Initialize event handler.
-  EventHandler::Initialize();
-
   // Initialize the Dart VM.
   Dart_Initialize(CreateIsolateAndSetup, NULL);
 
   original_script_name = strdup(script_name);
   original_working_directory = Directory::Current();
 
   // Call CreateIsolateAndSetup which creates an isolate and loads up
   // the specified application script.
   char* error = NULL;
   char* isolate_name = BuildIsolateName(original_script_name, "main");
@@ skipping 54 matching lines @@
   result = Dart_RunLoop();
   if (Dart_IsError(result)) {
     return ErrorExit("%s\n", Dart_GetError(result));
   }
 
   Dart_ExitScope();
   // Dump symbol information for the profiler.
   DumpPprofSymbolInfo();
   // Shutdown the isolate.
   Dart_ShutdownIsolate();
-  // Terminate event handler.
-  EventHandler::Terminate();
   // Terminate process exit-code handler.
   Process::TerminateExitCodeHandler();
 
   free(const_cast<char*>(original_script_name));
   free(const_cast<char*>(original_working_directory));
   free(const_cast<char*>(original_script_url));
 
   return 0;
 }