remove unused import in asyncore doc
diff --git a/Doc/library/asynchat.rst b/Doc/library/asynchat.rst
index 75b3cda..55c61d7 100644
--- a/Doc/library/asynchat.rst
+++ b/Doc/library/asynchat.rst
@@ -197,6 +197,9 @@
 marshalled, after setting the channel terminator to ``None`` to ensure that
 any extraneous data sent by the web client are ignored. ::
 
+
+   import asynchat
+
    class http_request_handler(asynchat.async_chat):
 
        def __init__(self, sock, addr, sessions, log):