Cleanup py27 support

This repo is now testing only with Python 3, so let's make
a few cleanups:
- Remove obsolete sections from setup.cfg
- Use warnings for sphinx-build
- Cleanup doc/source/conf.py to remove now obsolete content.

Change-Id: I49d20c142af9345125540de61e9476f317ab6a38

doc/source/conf.py

@@ -22,8 +22,6 @@
 # All configuration values have a default; values that are commented out
 # serve to show the default.
 
-import pbr.version
-
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
 # documentation root, use os.path.abspath to make it absolute, like shown here.
@@ -67,22 +65,6 @@ role_name = 'os_congress'
 target_name = 'openstack-ansible-' + role_name
 title = 'OpenStack-Ansible Documentation: ' + role_name + ' role'
 
-# The link to the browsable source code (for the left hand menu)
-oslosphinx_cgit_link = (
-    "https://opendev.org/openstack/{}".format(target_name)
-)
-
-# 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.
-#
-# The short X.Y version.
-version_info = pbr.version.VersionInfo(target_name)
-# The full version, including alpha/beta/rc tags.
-release = version_info.version_string_with_vcs()
-# The short X.Y version.
-version = version_info.canonical_version_string()
-
 # openstackdocstheme options
 repository_name = 'openstack/' + target_name
 bug_project = project.lower()
@@ -172,10 +154,6 @@ 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 = '%Y-%m-%d %H:%M'
-
 # If true, SmartyPants will be used to convert quotes and dashes to
 # typographically correct entities.
 # html_use_smartypants = True

setup.cfg

@@ -11,14 +11,3 @@ classifier =
     Intended Audience :: System Administrators
     License :: OSI Approved :: Apache Software License
     Operating System :: POSIX :: Linux
-
-[build_sphinx]
-all_files = 1
-build-dir = doc/build
-source-dir = doc/source
-
-[pbr]
-warnerrors = True
-
-[wheel]
-universal = 1

tox.ini

@@ -34,14 +34,14 @@ deps = -r{toxinidir}/doc/requirements.txt
 commands =
     bash -c "rm -rf doc/build"
     doc8 doc
-    sphinx-build --keep-going -b html doc/source doc/build/html
+    sphinx-build -W --keep-going -b html doc/source doc/build/html
 
 [testenv:pdf-docs]
 deps = {[testenv:docs]deps}
 whitelist_externals =
   make
 commands =
-  sphinx-build -W --keep-going -b latex doc/source doc/build/pdf
+  sphinx-build --keep-going -b latex doc/source doc/build/pdf
   make -C doc/build/pdf
 
 [doc8]