Cleanup py27 support and docs

Make a few cleanups:
- Remove obsolete sections from setup.cfg
- Remove install_command from tox.ini
- Update to current hacking version; fix warning found
- Remove unused requirements, update to newer versions for python3

Change-Id: I27fa5ef5cb23650e5210f714ce0c3dccdc564e8b

doc/requirements.txt

@@ -2,7 +2,5 @@
 # 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 # BSD
-sphinxcontrib-apidoc>=0.2.0  # BSD
-openstackdocstheme>=1.18.1 # Apache-2.0
-reno>=2.5.0 # Apache-2.0
+openstackdocstheme>=1.32.1 # Apache-2.0
 yasfb>=0.5.1

setup.cfg

@@ -10,14 +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
-
-[pbr]
-warnerrors = True
-
-[wheel]
-universal = 1

test-requirements.txt

@@ -2,4 +2,4 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 
-hacking>=0.12.0,!=0.13.0,<0.14  # Apache-2.0
+hacking>=3.0,<3.1.0  # Apache-2.0

tests/test_titles.py

@@ -82,7 +82,7 @@ class TestTitles(testtools.TestCase):
             if "http://" in line or "https://" in line:
                 continue
             # Allow lines which do not contain any whitespace
-            if re.match("\s*[^\s]+$", line):
+            if re.match(r"\s*[^\s]+$", line):
                 continue
             self.assertTrue(
                 len(line) < 80,

tox.ini

@@ -8,7 +8,6 @@ ignore_basepython_conflict = True
 basepython = python3
 usedevelop = True
 setenv = VIRTUAL_ENV={envdir}
-install_command = pip install -U {opts} {packages}
 deps = -r{toxinidir}/requirements.txt
 whitelist_externals = find
 commands =