Remove unused imports

mininet/cli.py

@@ -36,7 +36,7 @@ import atexit
 
 from mininet.log import info, output, error
 from mininet.term import makeTerms, runX11
-from mininet.util import ( quietRun, isShellBuiltin, dumpNodeConnections,
+from mininet.util import ( quietRun, dumpNodeConnections,
                          dumpPorts )
 
 class CLI( Cmd ):

mininet/net.py

@@ -91,7 +91,7 @@ import re
 import select
 import signal
 import random
-import copy
+
 from time import sleep
 from itertools import chain, groupby
 from math import ceil

mininet/node.py

@@ -51,7 +51,7 @@ import pty
 import re
 import signal
 import select
-from subprocess import Popen, PIPE, STDOUT
+from subprocess import Popen, PIPE
 from operator import or_
 from time import sleep
 

mininet/nodelib.py

@@ -5,7 +5,7 @@ This contains additional Node types which you may find to be useful.
 """
 
 from mininet.node import Node, Switch
-from mininet.log import setLogLevel, info
+from mininet.log import info
 from mininet.moduledeps import pathCheck