Remove VM Stats

runtime/bin/vmstats_impl_linux.cc

-// Copyright (c) 2013, 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 "platform/globals.h"
-#if defined(TARGET_OS_LINUX)
-
-#include "bin/vmstats_impl.h"
-
-#include <signal.h>  // NOLINT
-
-
-namespace dart {
-namespace bin {
-
-static void sig_handler(int sig, siginfo_t* siginfo, void*) {
-  if (sig == SIGQUIT) {
-    VmStats::DumpStack();
-  } else {
-    FATAL1("unrequested signal %d received\n", sig);
-  }
-}
-
-void VmStats::Initialize() {
-  // Enable SIGQUIT (ctrl-\) stack dumps.
-  struct sigaction sigact;
-  memset(&sigact, '\0', sizeof(sigact));
-  sigact.sa_sigaction = sig_handler;
-  sigact.sa_flags = SA_SIGINFO;
-  if (sigaction(SIGQUIT, &sigact, NULL) < 0) {
-    perror("sigaction");
-  }
-}
-
-}  // namespace bin
-}  // namespace dart
-
-#endif  // defined(TARGET_OS_LINUX)