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
- Update requirements, no need for python_version anymore
- Cleanup doc/source/conf.py to remove now obsolete content.
- Use newer openstackdocstheme and sphinx versions
- Update constraints URL

Change-Id: I71fad2f2287477ae570ae40a8705b035bbc6a38e

doc/source/conf.py

@@ -29,7 +29,7 @@ extensions = [
 ]
 
 # Feed configuration for yasfb
-feed_base_url = 'http://specs.openstack.org/openstack/ironic-inspector'
+feed_base_url = 'https://specs.openstack.org/openstack/ironic-inspector'
 feed_author = 'OpenStack Ironic Inspector Team'
 
 exclude_patterns = [
@@ -97,4 +97,3 @@ latex_documents = [
 # openstackdocstheme options
 repository_name = 'openstack/ironic-inspector-specs'
 use_storyboard = True
-

requirements.txt

@@ -1,4 +1,4 @@
 pbr!=2.1.0,>=2.0.0
-sphinx!=1.6.6,!=1.6.7,>=1.6.2;python_version>='3.4' # BSD
-openstackdocstheme>=1.20.0 # Apache-2.0
+sphinx!=2.1.0,>=2.0.0 # BSD
+openstackdocstheme>=2.0.0 # Apache-2.0
 yasfb>=0.5.1

setup.cfg

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

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-minversion = 1.6
+minversion = 3.1.1
 envlist = pep8,docs
 
 [testenv]
@@ -7,7 +7,7 @@ basepython = python3
 usedevelop = True
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
-       -c{env:UPPER_CONSTRAINTS_FILE:https://opendev.org/openstack/requirements/raw/branch/master/upper-constraints.txt}
+       -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
 
 [testenv:venv]
 commands = {posargs}
@@ -26,6 +26,7 @@ commands = sphinx-build -W -b latex doc/source doc/build/pdf
 
 [testenv:spelling]
 deps =
+   -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
    -r{toxinidir}/requirements.txt
    sphinxcontrib-spelling
    PyEnchant