VMware: remove unused imports (#43804)

Idea taken from https://github.com/ansible/ansible/pull/43402

Signed-off-by: Abhijeet Kasurde <akasurde@redhat.com>

contrib/inventory/vmware_inventory.py

@@ -9,7 +9,7 @@
 
 # TODO:
 #   * more jq examples
-#   * optional folder heriarchy
+#   * optional folder hierarchy
 
 """
 $ jq '._meta.hostvars[].config' data.json | head
@@ -38,9 +38,8 @@ import sys
 import uuid
 from time import time
 
-import six
 from jinja2 import Environment
-from six import integer_types, string_types
+from six import integer_types, PY3
 from six.moves import configparser
 
 try:
@@ -235,7 +234,7 @@ class VMWareInventory(object):
             'groupby_custom_field': False}
         }
 
-        if six.PY3:
+        if PY3:
             config = configparser.ConfigParser()
         else:
             config = configparser.SafeConfigParser()