diff --git a/backends/twitter/rapidjson/internal/stack.h b/backends/twitter/rapidjson/internal/stack.h
deleted file mode 100644
index 966893b3fc01ecf5a80752926a4b6b621e694ca6..0000000000000000000000000000000000000000
--- a/backends/twitter/rapidjson/internal/stack.h
+++ /dev/null
@@ -1,82 +0,0 @@
-#ifndef RAPIDJSON_INTERNAL_STACK_H_
-#define RAPIDJSON_INTERNAL_STACK_H_
-
-namespace rapidjson {
-namespace internal {
-
-///////////////////////////////////////////////////////////////////////////////
-// Stack
-
-//! A type-unsafe stack for storing different types of data.
-/*! \tparam Allocator Allocator for allocating stack memory.
-*/
-template <typename Allocator>
-class Stack {
-public:
-	Stack(Allocator* allocator, size_t stack_capacity) : allocator_(allocator), own_allocator_(0), stack_(0), stack_top_(0), stack_end_(0), stack_capacity_(stack_capacity) {
-		RAPIDJSON_ASSERT(stack_capacity_ > 0);
-		if (!allocator_)
-			own_allocator_ = allocator_ = new Allocator();
-		stack_top_ = stack_ = (char*)allocator_->Malloc(stack_capacity_);
-		stack_end_ = stack_ + stack_capacity_;
-	}
-
-	~Stack() {
-		Allocator::Free(stack_);
-		delete own_allocator_; // Only delete if it is owned by the stack
-	}
-
-	void Clear() { /*stack_top_ = 0;*/ stack_top_ = stack_; }
-
-	template<typename T>
-	T* Push(size_t count = 1) {
-		 // Expand the stack if needed
-		if (stack_top_ + sizeof(T) * count >= stack_end_) {
-			size_t new_capacity = stack_capacity_ * 2;
-			size_t size = GetSize();
-			size_t new_size = GetSize() + sizeof(T) * count;
-			if (new_capacity < new_size)
-				new_capacity = new_size;
-			stack_ = (char*)allocator_->Realloc(stack_, stack_capacity_, new_capacity);
-			stack_capacity_ = new_capacity;
-			stack_top_ = stack_ + size;
-			stack_end_ = stack_ + stack_capacity_;
-		}
-		T* ret = (T*)stack_top_;
-		stack_top_ += sizeof(T) * count;
-		return ret;
-	}
-
-	template<typename T>
-	T* Pop(size_t count) {
-		RAPIDJSON_ASSERT(GetSize() >= count * sizeof(T));
-		stack_top_ -= count * sizeof(T);
-		return (T*)stack_top_;
-	}
-
-	template<typename T>
-	T* Top() { 
-		RAPIDJSON_ASSERT(GetSize() >= sizeof(T));
-		return (T*)(stack_top_ - sizeof(T));
-	}
-
-	template<typename T>
-	T* Bottom() { return (T*)stack_; }
-
-	Allocator& GetAllocator() { return *allocator_; }
-	size_t GetSize() const { return stack_top_ - stack_; }
-	size_t GetCapacity() const { return stack_capacity_; }
-
-private:
-	Allocator* allocator_;
-	Allocator* own_allocator_;
-	char *stack_;
-	char *stack_top_;
-	char *stack_end_;
-	size_t stack_capacity_;
-};
-
-} // namespace internal
-} // namespace rapidjson
-
-#endif // RAPIDJSON_STACK_H_