Bump the openstackdocstheme extension to 1.20

Some options are now automatically configured by the version 1.20:
- project
- html_last_updated_fmt
- latex_engine
- latex_elements
- version
- release.

Depends-On:https://review.opendev.org/#/c/660609/

Change-Id: I83ee2a89ae0a8158ed955581b738cea6ca93707d

doc/requirements.txt

@@ -3,7 +3,7 @@
 # process, which may cause wedges in the gate later.
 
 # These are needed for docs generation
-openstackdocstheme>=1.18.1 # Apache-2.0
+openstackdocstheme>=1.20.0 # Apache-2.0
 sphinx!=1.6.6,!=1.6.7,>=1.6.2,<2.0.0;python_version=='2.7'  # BSD
 sphinx!=1.6.6,!=1.6.7,>=1.6.2;python_version>='3.4'  # BSD
 reno>=2.5.0 # Apache-2.0

doc/source/conf.py

@@ -15,8 +15,6 @@ from __future__ import unicode_literals
 import os
 import sys
 
-import pbr.version
-
 
 sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__),
                 '..', '..')))
@@ -53,18 +51,8 @@ source_suffix = '.rst'
 master_doc = 'index'
 
 # General information about the project.
-project = 'python-keystoneclient'
 copyright = 'OpenStack Contributors'
 
-# The version info for the project you're documenting, acts as replacement for
-# |version| and |release|, also used in various other places throughout the
-# built documents.
-version_info = pbr.version.VersionInfo('python-keystoneclient')
-# The short X.Y version.
-version = version_info.version_string()
-# The full version, including alpha/beta/rc tags.
-release = version_info.release_string()
-
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
 #language = None
@@ -145,10 +133,6 @@ html_theme = 'openstackdocs'
 # so a file named "default.css" will overwrite the builtin "default.css".
 #html_static_path = ['static']
 
-# If not '', a 'Last updated on:' timestamp is inserted at every page bottom,
-# using the given strftime format.
-html_last_updated_fmt = '%Y-%m-%d %H:%M'
-
 # If true, SmartyPants will be used to convert quotes and dashes to
 # typographically correct entities.
 #html_use_smartypants = True

releasenotes/source/conf.py

@@ -54,7 +54,6 @@ source_suffix = '.rst'
 master_doc = 'index'
 
 # General information about the project.
-project = u'keystoneclient Release Notes'
 copyright = u'2015, Keystone Developers'
 
 # Release notes are version independent.
@@ -142,11 +141,6 @@ html_static_path = ['_static']
 # directly to the root of the documentation.
 # html_extra_path = []
 
-# If not '', a 'Last updated on:' timestamp is inserted at every page bottom,
-# using the given strftime format.
-# html_last_updated_fmt = '%b %d, %Y'
-html_last_updated_fmt = '%Y-%m-%d %H:%M'
-
 # If true, SmartyPants will be used to convert quotes and dashes to
 # typographically correct entities.
 # html_use_smartypants = True
@@ -190,17 +184,6 @@ htmlhelp_basename = 'KeystoneClientReleaseNotesdoc'
 
 # -- Options for LaTeX output ---------------------------------------------
 
-latex_elements = {
-    # The paper size ('letterpaper' or 'a4paper').
-    # 'papersize': 'letterpaper',
-
-    # The font size ('10pt', '11pt' or '12pt').
-    # 'pointsize': '10pt',
-
-    # Additional stuff for the LaTeX preamble.
-    # 'preamble': '',
-}
-
 # Grouping the document tree into LaTeX files. List of tuples
 # (source start file, target name, title,
 #  author, documentclass [howto, manual, or own class]).