Remove overly aggressive packet processing

With the socket pooling, we no longer have to be as aggressive about
trying to get packets out of the socket buffer.  However, in a very
busy system of several hundred nodes, this aggressive processing
tends to produce larger python stacks and can exceed the default
1,000 limit.  We may have to resort to increasing the limit one day,
but for now this case can be avoided.

Change-Id: I83bdaa2d8ad464727a69e6ece064f51cd4318822

pyghmi/ipmi/private/session.py

@@ -1403,11 +1403,6 @@ class Session(object):
         self.nowait = False
 
     def _xmit_packet(self, retry=True, delay_xmit=None):
-        if not self.nowait:  # if we are retrying, we really need to get the
-                            # packet out and get our timeout updated
-            Session.wait_for_rsp(timeout=0, callout=False)  # take opportunity
-                                                 # to drain the socket queue if
-                                                 # applicable
         if self.sequencenumber:  # seq number of zero will be left alone, it is
                                 # special, otherwise increment
             self.sequencenumber += 1