Stop closing connections explicitly.

Garbage-collecting memcache.Client instance does that automatically.

product/ERP5Type/Tool/MemcachedTool.py

@@ -94,22 +94,12 @@ if memcache is not None:
       self._initialiseConnection()
 
     def _initialiseConnection(self):
-      try:
-        self.memcached_connection.disconnect_all()
-      except AttributeError:
-        pass
       self.memcached_connection = memcache.Client(
         self.server_list,
         server_max_key_length=self.server_max_key_length,
         server_max_value_length=self.server_max_value_length,
       )
 
-    def __del__(self):
-      """
-        Close connection before deleting object.
-      """
-      self.memcached_connection.disconnect_all()
-
     def _finish(self, *ignored):
       """
         Actually modifies the values in memcached.