Cleanup py27 support and docs

This repo is now testing only with Python 3, so let's make
a few cleanups:
- Remove obsolete sections from setup.cfg
- Update requirements, no need for python_version anymore
- Cleanup doc/source/conf.py to remove now obsolete content.
- Use newer openstackdocstheme version
- Remove install_command from tox.ini, the default is fine

Change-Id: I785318b3090d7117d74d165ba3236dc239cf9ea1

doc/requirements.txt

@@ -2,7 +2,6 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 
-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
+sphinx!=1.6.6,!=1.6.7,>=1.6.2  # BSD
 sphinxcontrib-blockdiag>=1.1.0
-openstackdocstheme>=1.28.0 # Apache-2.0
+openstackdocstheme>=1.31.2 # Apache-2.0

doc/source/conf.py

@@ -26,8 +26,6 @@ extensions = [
 
 # openstackdocstheme options
 repository_name = 'openstack/openstack-helm'
-bug_project = '886'
-bug_tag = 'docs'
 use_storyboard = True
 
 # autodoc generation is a bit aggressive and a nuisance when doing heavy

setup.cfg

@@ -10,12 +10,3 @@ classifier =
     Intended Audience :: Developers
     License :: OSI Approved :: Apache Software License
     Operating System :: POSIX :: Linux
-
-[build_sphinx]
-all_files = 1
-build-dir = doc/build
-source-dir = doc/source
-warning-is-error = True
-
-[wheel]
-universal = 1

tox.ini

@@ -6,9 +6,8 @@ ignore_basepython_conflict = True
 
 [testenv]
 basepython = python3
-install_command = pip install -U {opts} {packages}
 setenv = VIRTUAL_ENV={envdir}
-deps = -c{env:UPPER_CONSTRAINTS_FILE:https://opendev.org/openstack/requirements/raw/branch/master/upper-constraints.txt}
+deps = -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
 passenv = *_proxy *_PROXY
 
 [testenv:venv]
@@ -17,7 +16,7 @@ commands = {posargs}
 [testenv:docs]
 deps = -r{toxinidir}/doc/requirements.txt
 commands =
-  bash -c "rm -rf doc/build"
+  rm -rf doc/build
   docstheme-build-translated.sh
 whitelist_externals =
-  bash
+  rm