remove unused import in asyncore doc

Doc/library/asynchat.rst

@@ -197,6 +197,9 @@ The :meth:`handle_request` method is called once all relevant input has been
 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):

Doc/library/asyncore.rst

@@ -277,7 +277,7 @@ asyncore Example basic HTTP client
 Here is a very basic HTTP client that uses the :class:`dispatcher` class to
 implement its socket handling::
 
-   import asyncore, socket
+   import asyncore
 
    class HTTPClient(asyncore.dispatcher):
 
@@ -317,7 +317,6 @@ Here is a basic echo server that uses the :class:`dispatcher` class to accept
 connections and dispatches the incoming connections to a handler::
 
     import asyncore
-    import socket
 
     class EchoHandler(asyncore.dispatcher_with_send):
 
@@ -341,4 +340,3 @@ connections and dispatches the incoming connections to a handler::
 
     server = EchoServer('localhost', 8080)
     asyncore.loop()
-