remove useless code of BaseIOStream

diff --git a/tornado/iostream.py b/tornado/iostream.py
index 40e75a5344dfcd118e6b85e42057ada72c54d98b..651a3a8998bfc7ea39a32cf230377e1ba63f2824 100644 (file)
--- a/tornado/iostream.py
+++ b/tornado/iostream.py
@@ -203,7 +203,6 @@ class BaseIOStream(object):
             self._run_read_callback(self._consume(self._read_buffer_size))
             return future
         self._read_until_close = True
-        self._streaming_callback = stack_context.wrap(streaming_callback)
         self._try_inline_read()
         return future