Revert: Fixes memory leaks in the eventhandler

runtime/bin/eventhandler_linux.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.
 
 #if !defined(DART_IO_DISABLED)
 
 #include "platform/globals.h"
 #if defined(TARGET_OS_LINUX)
 
 #include "bin/eventhandler.h"
@@ skipping 109 matching lines @@
                                        EPOLL_CTL_ADD,
                                        timer_fd_,
                                        &event));
   if (status == -1) {
     FATAL2(
         "Failed adding timerfd fd(%i) to epoll instance: %i", timer_fd_, errno);
   }
 }
 
 
-static void DeleteDescriptorInfo(void* info) {
-  DescriptorInfo* di = reinterpret_cast<DescriptorInfo*>(info);
-  di->Close();
-  delete di;
-}
-
-
 EventHandlerImplementation::~EventHandlerImplementation() {
-  socket_map_.Clear(DeleteDescriptorInfo);
   VOID_TEMP_FAILURE_RETRY(close(epoll_fd_));
   VOID_TEMP_FAILURE_RETRY(close(timer_fd_));
   VOID_TEMP_FAILURE_RETRY(close(interrupt_fds_[0]));
   VOID_TEMP_FAILURE_RETRY(close(interrupt_fds_[1]));
 }
 
 
 void EventHandlerImplementation::UpdateEpollInstance(intptr_t old_mask,
                                                      DescriptorInfo *di) {
   intptr_t new_mask = di->Mask();
@@ skipping 293 matching lines @@
   // The hashmap does not support keys with value 0.
   return dart::Utils::WordHash(fd + 1);
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_LINUX)
 
 #endif  // !defined(DART_IO_DISABLED)