Preserve comments explaining empty destructors

src/D3D12MemAlloc.cpp

@@ -1553,6 +1553,11 @@ public:
 
     // allocationCallbacks externally owned, must outlive this object.
     List(const ALLOCATION_CALLBACKS& allocationCallbacks);
+
+    // Intentionally not calling Clear, because that would be unnecessary
+    // computations to return all items to m_ItemAllocator as free.
+    // ~List() {}
+    
     void Clear();
 
     size_t GetCount() const { return m_Count; }

src/D3D12MemAlloc.h

@@ -401,6 +401,9 @@ private:
     } m_PackedData;
 
     Allocation(AllocatorPimpl* allocator, UINT64 size, BOOL wasZeroInitialized);
+    //  Nothing here, everything already done in Release.
+    // ~Allocation() {}
+    
     void InitCommitted(CommittedAllocationList* list);
     void InitPlaced(UINT64 offset, UINT64 alignment, NormalBlock* block);
     void InitHeap(CommittedAllocationList* list, ID3D12Heap* heap);