tests: remove py2/py3 six compatability library

Type: test

Change-Id: Idb6b8169845e0239e639429ccfd02a683212b7e6
Signed-off-by: Paul Vinciguerra <pvinci@vinciconsulting.com>
diff --git a/test/vpp_interface.py b/test/vpp_interface.py
index cb1fbaf..32d8166 100644
--- a/test/vpp_interface.py
+++ b/test/vpp_interface.py
@@ -2,9 +2,6 @@
 import socket
 import abc
 
-import six
-from six import moves
-
 from util import Host, mk_ll_addr
 from vpp_papi import mac_ntop, VppEnum
 from ipaddress import IPv4Network, IPv6Network
@@ -15,8 +12,7 @@
     text_type = str
 
 
-@six.add_metaclass(abc.ABCMeta)
-class VppInterface(object):
+class VppInterface(metaclass=abc.ABCMeta):
     """Generic VPP interface."""
 
     @property