remove most of Python2 compatibility code

wx/tools/pywxrc.py

@@ -31,8 +31,6 @@ Usage: python pywxrc.py -h
   -o, --output   output filename, or - for stdout
 """
 
-from __future__ import print_function
-
 import sys, os, getopt, glob, re
 import xml.dom.minidom as minidom
 from six import byte2int

wx/tools/wxget.py

@@ -26,22 +26,15 @@ Where URL is a file URL and the optional DEST_DIR is a destination directory to
 download to, (default is to prompt the user).
 The --trusted option can be used to suppress certificate checks.
 """
-from __future__ import (division, absolute_import, print_function, unicode_literals)
-
 import sys
 import os
 import wx
 import subprocess
 import ssl
 
-if sys.version_info >= (3,):
-    from urllib.error import (HTTPError, URLError)
-    import urllib.request as urllib2
-    import urllib.parse as urlparse
-else:
-    import urllib2
-    from urllib2 import (HTTPError, URLError)
-    import urlparse
+from urllib.error import (HTTPError, URLError)
+import urllib.request as urllib2
+import urllib.parse as urlparse
 
 try:
     import pip

wx/tools/wxget_docs_demo.py

@@ -26,24 +26,16 @@ launch it.
 
 Use: doc|demo --force to force a fresh download.
 """
-from __future__ import (division, absolute_import, print_function, unicode_literals)
-
 import sys
 import os
 import subprocess
 import webbrowser
 import tarfile
 import warnings
-if sys.version_info >= (3,):
-    from urllib.error import HTTPError
-    import urllib.request as urllib2
-    import urllib.parse as urlparse
-    from urllib.request import pathname2url
-else:
-    import urllib2
-    from urllib2 import HTTPError
-    import urlparse
-    from urllib import pathname2url
+from urllib.error import HTTPError
+import urllib.request as urllib2
+import urllib.parse as urlparse
+from urllib.request import pathname2url
 
 import wx
 from wx.tools import wxget