clean up unnecessary usage of the six library (awx only supports py3)

awx/main/migrations/_inventory_source.py

@@ -1,7 +1,6 @@
 import logging
 
 from django.db.models import Q
-import six
 
 logger = logging.getLogger('awx.main.migrations')
 
@@ -39,8 +38,8 @@ def rename_inventory_sources(apps, schema_editor):
                                                                   Q(deprecated_group__inventory__organization=org)).distinct().all()):
 
             inventory = invsrc.deprecated_group.inventory if invsrc.deprecated_group else invsrc.inventory
-            name = six.text_type('{0} - {1} - {2}').format(invsrc.name, inventory.name, i)
-            logger.debug(six.text_type("Renaming InventorySource({0}) {1} -> {2}").format(
+            name = '{0} - {1} - {2}'.format(invsrc.name, inventory.name, i)
+            logger.debug("Renaming InventorySource({0}) {1} -> {2}".format(
                 invsrc.pk, invsrc.name, name
             ))
             invsrc.name = name

awx/main/migrations/_reencrypt.py

@@ -1,7 +1,6 @@
 import logging
 import json
 from django.utils.translation import ugettext_lazy as _
-import six
 
 from awx.conf.migrations._reencrypt import (
     decrypt_field,

awx/main/migrations/_scan_jobs.py

@@ -3,8 +3,6 @@ import logging
 from django.utils.timezone import now
 from django.utils.text import slugify
 
-import six
-
 from awx.main.models.base import PERM_INVENTORY_SCAN, PERM_INVENTORY_DEPLOY
 from awx.main import utils
 
@@ -26,7 +24,7 @@ def _create_fact_scan_project(ContentType, Project, org):
                    polymorphic_ctype=ct)
     proj.save()
 
-    slug_name = slugify(six.text_type(name)).replace(u'-', u'_')
+    slug_name = slugify(str(name)).replace(u'-', u'_')
     proj.local_path = u'_%d__%s' % (int(proj.pk), slug_name)
 
     proj.save()