Minor codecheck fixes

examples/sshd.py

@@ -55,7 +55,7 @@ def sshd( network, cmd='/usr/sbin/sshd', opts='-D',
     if not switch:
         switch = network[ 's1' ]  # switch to use
     if not routes:
-         routes = [ '10.0.0.0/24' ]
+        routes = [ '10.0.0.0/24' ]
     connectToRootNS( network, switch, ip, routes )
     for host in network.hosts:
         host.cmd( cmd + ' ' + opts + '&' )

mininet/test/test_walkthrough.py

@@ -9,7 +9,6 @@ TODO: missing xterm test
 import unittest
 import pexpect
 import os
-from time import sleep
 from mininet.util import quietRun
 
 class testWalkthrough( unittest.TestCase ):