diff --git a/backends/twitter/rapidjson/stringbuffer.h b/backends/twitter/rapidjson/stringbuffer.h
deleted file mode 100644
index 269ae10761dc22bc894e7ceee2a4ab81bbf58db5..0000000000000000000000000000000000000000
--- a/backends/twitter/rapidjson/stringbuffer.h
+++ /dev/null
@@ -1,49 +0,0 @@
-#ifndef RAPIDJSON_STRINGBUFFER_H_
-#define RAPIDJSON_STRINGBUFFER_H_
-
-#include "rapidjson.h"
-#include "internal/stack.h"
-
-namespace rapidjson {
-
-//! Represents an in-memory output stream.
-/*!
-	\tparam Encoding Encoding of the stream.
-	\tparam Allocator type for allocating memory buffer.
-	\implements Stream
-*/
-template <typename Encoding, typename Allocator = CrtAllocator>
-struct GenericStringBuffer {
-	typedef typename Encoding::Ch Ch;
-
-	GenericStringBuffer(Allocator* allocator = 0, size_t capacity = kDefaultCapacity) : stack_(allocator, capacity) {}
-
-	void Put(Ch c) { *stack_.template Push<Ch>() = c; }
-
-	void Clear() { stack_.Clear(); }
-
-	const char* GetString() const {
-		// Push and pop a null terminator. This is safe.
-		*stack_.template Push<Ch>() = '\0';
-		stack_.template Pop<Ch>(1);
-
-		return stack_.template Bottom<Ch>();
-	}
-
-	size_t Size() const { return stack_.GetSize(); }
-
-	static const size_t kDefaultCapacity = 256;
-	mutable internal::Stack<Allocator> stack_;
-};
-
-typedef GenericStringBuffer<UTF8<> > StringBuffer;
-
-//! Implement specialized version of PutN() with memset() for better performance.
-template<>
-inline void PutN(GenericStringBuffer<UTF8<> >& stream, char c, size_t n) {
-	memset(stream.stack_.Push<char>(n), c, n * sizeof(c));
-}
-
-} // namespace rapidjson
-
-#endif // RAPIDJSON_STRINGBUFFER_H_