Remove six

We don't need this dependency anymore.

Change-Id: I816b9aa687b90299326085b642c992e42c11c029

openstack_releases/cmds/interactive_release.py

@@ -20,8 +20,6 @@ import subprocess
 import sys
 import tempfile
 
-import six
-
 from prompt_toolkit.completion import WordCompleter
 from prompt_toolkit import prompt
 from prompt_toolkit.validation import ValidationError
@@ -55,9 +53,9 @@ Notes:
 
 
 def to_unicode(blob, encoding='utf8'):
-    if isinstance(blob, six.text_type):
+    if isinstance(blob, str):
         return blob
-    elif isinstance(blob, six.binary_type):
+    elif isinstance(blob, bytes):
         return blob.decode(encoding)
     else:
         raise TypeError("Unable to convert %r to a text type" % blob)

openstack_releases/cmds/validate.py

@@ -30,7 +30,6 @@ import tempfile
 
 from openstack_governance import governance
 import requests
-import six
 
 # Disable warnings about insecure connections.
 from requests.packages import urllib3
@@ -1560,7 +1559,7 @@ def validate_stable_branches(deliv, context):
         location = branch.location
 
         if branch_mode == 'std' or branch_mode == 'std-with-versions':
-            if not isinstance(location, six.string_types):
+            if not isinstance(location, str):
                 context.error(
                     ('branch location for %s is '
                      'expected to be a string but got a %s' % (
@@ -1645,7 +1644,7 @@ def validate_stable_branches(deliv, context):
                     )
 
         elif branch_mode == 'upstream':
-            if not isinstance(location, six.string_types):
+            if not isinstance(location, str):
                 context.error(
                     ('branch location for %s is '
                      'expected to be a string but got a %s' % (

openstack_releases/rst2txt.py

@@ -29,7 +29,6 @@ from docutils import core
 from docutils import nodes
 from docutils.utils import column_width
 from docutils import writers
-from six.moves import zip_longest
 
 from sphinx import addnodes
 
@@ -563,7 +562,7 @@ class TextTranslator(nodes.NodeVisitor):
             self.add_text(''.join(out) + self.nl)
 
         def writerow(row):
-            lines = zip_longest(*row)
+            lines = itertools.zip_longest(*row)
             for line in lines:
                 out = ['|']
                 for i, cell in enumerate(line):