Begin to remove heap/*

sky/engine/platform/heap/Heap.h

Index: sky/engine/platform/heap/Heap.h
diff --git a/sky/engine/platform/heap/Heap.h b/sky/engine/platform/heap/Heap.h
index e1f071cefee6b21b53b75cf6981ffc6ad328ba33..22cdb206f24be1b46e1aad9dcbbf9440a9aba51b 100644
--- a/sky/engine/platform/heap/Heap.h
+++ b/sky/engine/platform/heap/Heap.h
@@ -1050,10 +1050,6 @@ private:
 
 class PLATFORM_EXPORT Heap {
 public:
-    static void init();
-    static void shutdown();
-    static void doShutdown();
-
     static BaseHeapPage* contains(Address);
     static BaseHeapPage* contains(void* pointer) { return contains(reinterpret_cast<Address>(pointer)); }
     static BaseHeapPage* contains(const void* pointer) { return contains(const_cast<void*>(pointer)); }