drop python2 support in wmi.py and ese.py

impacket/dcerpc/v5/dcom/wmi.py

@@ -30,6 +30,7 @@
 import collections.abc
 import logging
 import six
+from collections import OrderedDict
 
 from impacket.dcerpc.v5.ndr import NDRSTRUCT, NDRUniConformantArray, NDRPOINTER, NDRUniConformantVaryingArray, NDRUNION, \
     NDRENUM
@@ -57,13 +58,6 @@ def format_structure(d, level=0):
     else:
         x = str(d)
     return x
-try:
-    from collections import OrderedDict
-except:
-    try:
-        from ordereddict.ordereddict import OrderedDict
-    except:
-        from ordereddict import OrderedDict
 
 class DCERPCSessionError(DCERPCException):
     def __init__(self, error_string=None, error_code=None, packet=None):

impacket/ese.py

@@ -29,13 +29,7 @@
 from __future__ import division
 from __future__ import print_function
 from impacket import LOG
-try:
-    from collections import OrderedDict
-except:
-    try:
-        from ordereddict.ordereddict import OrderedDict
-    except:
-        from ordereddict import OrderedDict
+from collections import OrderedDict
 from impacket.structure import Structure, hexdump
 from struct import unpack
 from binascii import hexlify