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

runtime/vm/malloc_hooks.h

Index: runtime/vm/malloc_hooks.h
diff --git a/runtime/vm/malloc_hooks.h b/runtime/vm/malloc_hooks.h
index d741a5f63757653f576f94136b48acc4c7a2b818..ae09402388d4fb9b7af1b932b4d78e3f2f6811d7 100644
--- a/runtime/vm/malloc_hooks.h
+++ b/runtime/vm/malloc_hooks.h
@@ -10,13 +10,7 @@
 namespace dart {
 
 class MallocHooks {
- public:
-  static void InitOnce();
-  static void TearDown();
-  static void ResetStats();
-
-  static intptr_t allocation_count();
-  static intptr_t heap_allocated_memory_in_bytes();
+  static void Init();
 
  private:
   DISALLOW_ALLOCATION();