Remove raw_input usage and other python2 support in examples

examples/user_location.py

@@ -97,7 +97,7 @@ if __name__ == '__main__':
                         format='%(levelname)-8s %(message)s')
 
     if opts.jid is None:
-        opts.jid = raw_input("Username: ")
+        opts.jid = input("Username: ")
     if opts.password is None:
         opts.password = getpass.getpass("Password: ")