Use ProtocolError instead of Notify for unexpected answers, and drop Notify

neo/lib/connection.py

@@ -138,7 +138,7 @@ class HandlerSwitcher(object):
             else:
                 logging.error('Unexpected answer %r in %r', packet, connection)
                 if not connection.isClosed():
-                    connection.send(Packets.Notify(
+                    connection.answer(Errors.ProtocolError(
                         'Unexpected answer: %r' % packet))
                     connection.abort()
         finally:

neo/lib/handler.py

@@ -198,9 +198,6 @@ class EventHandler(object):
         # to test/maintain underlying connection.
         pass
 
-    def notify(self, conn, message):
-        logging.warning('notification from %r: %s', conn, message)
-
     def closeClient(self, conn):
         conn.server = False
         if not conn.client:

neo/lib/protocol.py

@@ -663,14 +663,6 @@ PFOidList = PList('oid_list',
 
 # packets definition
 
-class Notify(Packet):
-    """
-        General purpose notification (remote logging)
-    """
-    _fmt = PStruct('notify',
-        PString('message'),
-    )
-
 class Error(Packet):
     """
     Error is a special type of message, because this can be sent against
@@ -1677,8 +1669,6 @@ class Packets(dict):
                     Ping)
     CloseClient  = register(
                     CloseClient)
-    Notify = register(
-                    Notify)
     AskPrimary, AnswerPrimary = register(
                     PrimaryMaster)
     NotPrimaryMaster = register(