ImproperlyConfigured is imported but not used in transport. (elastic#693)

Author: fbacchella

elasticsearch/transport.py

@@ -5,7 +5,7 @@
 from .connection_pool import ConnectionPool, DummyConnectionPool
 from .serializer import JSONSerializer, Deserializer, DEFAULT_SERIALIZERS
 from .exceptions import ConnectionError, TransportError, SerializationError, \
- ConnectionTimeout, ImproperlyConfigured
+ ConnectionTimeout
 
 
 def get_host_info(node_info, host):