Revert "ipsec: VPP-1316 calculate IP/TCP/UDP inner checksums"

This reverts commit a98346f664.

Change-Id: Iee5b3a5ddff0e8fd3a30fe5973cee24de434fe12
Signed-off-by: Ole Troan <ot@cisco.com>

test/vpp_interface.py

@@ -2,6 +2,7 @@ from abc import abstractmethod, ABCMeta
 import socket
 
 from util import Host, mk_ll_addr
+from vpp_neighbor import VppNeighbor
 
 
 class VppInterface(object):
@@ -170,9 +171,6 @@ class VppInterface(object):
         self._hosts_by_ip4 = {}
         self._hosts_by_ip6 = {}
 
-    def set_sw_if_index(self, sw_if_index):
-        self._sw_if_index = sw_if_index
-
         self.generate_remote_hosts()
 
         self._local_ip4 = "172.16.%u.1" % self.sw_if_index