Revert "Reintroducing MallocHooks changes with fix for infinite loop in MallocHooks on Platform::Ex…

runtime/vm/dart.cc

Index: runtime/vm/dart.cc
diff --git a/runtime/vm/dart.cc b/runtime/vm/dart.cc
index d50189f68dd5f3a9e3bd71f77409373facca1201..57f5cbe759f160cb13e4894006d30ffca83a1c70 100644
--- a/runtime/vm/dart.cc
+++ b/runtime/vm/dart.cc
@@ -17,7 +17,6 @@
 #include "vm/heap.h"
 #include "vm/isolate.h"
 #include "vm/kernel_isolate.h"
-#include "vm/malloc_hooks.h"
 #include "vm/message_handler.h"
 #include "vm/metrics.h"
 #include "vm/object.h"
@@ -155,7 +154,6 @@ char* Dart::InitOnce(const uint8_t* vm_isolate_snapshot,
   start_time_micros_ = OS::GetCurrentMonotonicMicros();
   VirtualMemory::InitOnce();
   OSThread::InitOnce();
-  MallocHooks::InitOnce();
   if (FLAG_support_timeline) {
     Timeline::InitOnce();
   }
@@ -493,7 +491,7 @@ const char* Dart::Cleanup() {
   if (FLAG_trace_shutdown) {
     OS::PrintErr("[+%" Pd64 "ms] SHUTDOWN: Done\n", UptimeMillis());
   }
-  MallocHooks::TearDown();
+
   return NULL;
 }