Cleanup py27 support

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: If224e2f3d582ad378b8ef8840604cad3172538a6

doc/requirements.txt

@@ -1,3 +1,2 @@
-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,!=2.1.0,>=1.6.2;python_version>='3.4'  # BSD
+openstackdocstheme>=1.32.1 # Apache-2.0
+sphinx!=1.6.6,!=1.6.7,!=2.1.0,>=1.6.2  # BSD

doc/source/conf.py

@@ -106,8 +106,7 @@ man_pages = []
 html_theme = 'openstackdocs'
 
 repository_name = 'openstack/sahara-specs'
-bug_project = '939'
-bug_tag = 'spec'
+use_storyboard = True
 
 # Theme options are theme-specific and customize the look and feel of a theme
 # further.  For a list of options available for each theme, see the

setup.cfg

@@ -10,15 +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 = 1
-
-[pbr]
-warnerrors = True
-
-[wheel]
-universal = 1

tox.ini

@@ -6,7 +6,6 @@ skipsdist = True
 [testenv]
 usedevelop = True
 setenv = VIRTUAL_ENV={envdir}
-install_command = pip install -U {opts} {packages}
 deps = -r{toxinidir}/requirements.txt
 commands =
     stestr run {posargs}