Remove unused BidirectionalStream::SendData() method and implementations.

net/http/bidirectional_stream.h

Index: net/http/bidirectional_stream.h
diff --git a/net/http/bidirectional_stream.h b/net/http/bidirectional_stream.h
index 09b809cb8e8847481778ec87c061503fdc486910..aaab6e4edba40ea0a82d976925eb4471f6a6196e 100644
--- a/net/http/bidirectional_stream.h
+++ b/net/http/bidirectional_stream.h
@@ -147,11 +147,6 @@ class NET_EXPORT BidirectionalStream
   // invoked, and should not be called again until Delegate::OnDataSent is
   // invoked. If |end_stream| is true, the DATA frame will have an END_STREAM
   // flag.
-  void SendData(const scoped_refptr<IOBuffer>& data,
-                int length,
-                bool end_stream);
-
-  // Same as SendData except this takes in a vector of IOBuffers.
   void SendvData(const std::vector<scoped_refptr<IOBuffer>>& buffers,
                  const std::vector<int>& lengths,
                  bool end_stream);