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.

Change-Id: Iae624665505cc5948756318ecf2914678c103461

doc/requirements.txt

@@ -6,7 +6,7 @@ sphinx>=1.6.2 # BSD
 actdiag
 blockdiag
 nwdiag
-openstackdocstheme>=1.17.0 # Apache-2.0
+openstackdocstheme>=1.20.0 # Apache-2.0
 seqdiag
 sphinxcontrib-actdiag
 sphinxcontrib-blockdiag # BSD

doc/source/conf.py

@@ -63,7 +63,6 @@ source_suffix = '.rst'
 master_doc = 'index'
 
 # General information about the project.
-project = u'Neutron Specifications'
 copyright = u'%s, OpenStack Neutron Team' % datetime.date.today().year
 
 # The language for content autogenerated by Sphinx. Refer to documentation
@@ -136,12 +135,6 @@ html_theme = 'openstackdocs'
 # pixels large.
 #html_favicon = None
 
-# If not '', a 'Last updated on:' timestamp is inserted at every page bottom,
-# using the given strftime format.
-git_cmd = ["git", "log", "--pretty=format:'%ad, commit %h'", "--date=local",
-           "-n1"]
-html_last_updated_fmt = subprocess.check_output(git_cmd).decode('utf-8')
-
 # If true, SmartyPants will be used to convert quotes and dashes to
 # typographically correct entities.
 #html_use_smartypants = True
@@ -185,17 +178,6 @@ htmlhelp_basename = 'Neutron-Specsdoc'
 
 # -- 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]).
 latex_documents = [