Remove unused method in GeventConnection

cassandra/io/geventreactor.py

@@ -7,7 +7,6 @@ from collections import defaultdict
 from functools import partial
 import logging
 import os
-import sys
 
 try:
     from cStringIO import StringIO
@@ -98,9 +97,6 @@ class GeventConnection(Connection):
             # don't leave in-progress operations hanging
             self.connected_event.set()
 
-    def handle_error(self):
-        self.defunct(sys.exc_info()[1])
-
     def handle_close(self):
         log.debug("connection closed by server")
         self.close()