Remove unused thread pool from standalone VM binary.

runtime/bin/eventhandler.h

Index: runtime/bin/eventhandler.h
diff --git a/runtime/bin/eventhandler.h b/runtime/bin/eventhandler.h
index c4edf0606559a1c24338c0632de6152a3bd0ed68..eb428fd991e084e99a82f952151611b82d825586 100644
--- a/runtime/bin/eventhandler.h
+++ b/runtime/bin/eventhandler.h
@@ -6,7 +6,6 @@
 #define BIN_EVENTHANDLER_H_
 
 #include "bin/builtin.h"
-#include "bin/thread_pool.h"
 
 // Flags used to provide information and actions to the eventhandler
 // when sending a message about a file descriptor. These flags should
@@ -42,28 +41,6 @@ class EventHandler {
     delegate_.SendData(id, dart_port, data);
   }
 
-  static void AsyncTaskHandler(ThreadPool::Task args) {
-    if (Dart_IsVMFlagSet("trace_thread_pool")) {
-      printf("Got async task\n");
-    }
-  }
-
-  static void Initialize() {
-    if (Dart_IsVMFlagSet("enable_thread_pool")) {
-      ASSERT(thread_pool_ == NULL);
-      thread_pool_ = new ThreadPool(&EventHandler::AsyncTaskHandler);
-      thread_pool_->Start();
-    }
-  }
-
-  static void Terminate() {
-    if (Dart_IsVMFlagSet("enable_thread_pool")) {
-      if (thread_pool_ != NULL) {
-        thread_pool_->Shutdown();
-      }
-    }
-  }
-
   static EventHandler* StartEventHandler() {
     EventHandler* handler = new EventHandler();
     handler->delegate_.StartEventHandler();
@@ -72,7 +49,6 @@ class EventHandler {
 
  private:
   EventHandlerImplementation delegate_;
-  static ThreadPool* thread_pool_;
 };