Cleanup py27 support

Make a few cleanups:
- Remove python 2.7 stanza from setup.py
- Add requires on python >= 3.6 to setup.cfg so that pypi and pip
  know about the requirement
- Remove obsolete sections from setup.cfg:
  * Wheel is not needed for python 3 only repo
  * Some other sections are obsolete
- Update classifiers
- Update requirements, no need for python_version anymore
- Remove html_last_updated_fmt from conf.py, this is not needed with
  openstackdocstheme anymore; update openstackdocstheme requirement

Change-Id: I5389ba08c985e023643c07adf3135809c291146f

doc/requirements.txt

@@ -1,7 +1,6 @@
 # The order of packages is significant, because pip processes them in the order
 # 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
 reno>=2.7.0 # Apache-2.0
 openstackdocstheme>=1.18.1 # Apache-2.0

doc/source/conf.py

@@ -12,7 +12,6 @@ extensions = ['sphinx.ext.autodoc', 'sphinx.ext.viewcode', 'openstackdocstheme']
 repository_name = 'openstack/python-designateclient'
 bug_project = 'python-designateclient'
 bug_tag = ''
-html_last_updated_fmt = '%Y-%m-%d %H:%M'
 html_theme = 'openstackdocs'
 
 # Add any paths that contain templates here, relative to this directory.

releasenotes/source/conf.py

@@ -45,7 +45,6 @@ extensions = [
 repository_name = 'openstack/python-designateclient'
 bug_project = 'python-designateclient'
 bug_tag = ''
-html_last_updated_fmt = '%Y-%m-%d %H:%M'
 html_theme = 'openstackdocs'
 
 # Add any paths that contain templates here, relative to this directory.

setup.cfg

@@ -7,6 +7,7 @@ license = Apache License, Version 2.0
 author = OpenStack
 author-email = openstack-discuss@lists.openstack.org
 home-page = https://docs.openstack.org/python-designateclient/latest
+python-requires = >=3.6
 classifier =
     Environment :: OpenStack
     Intended Audience :: Information Technology
@@ -14,15 +15,13 @@ classifier =
     License :: OSI Approved :: Apache Software License
     Operating System :: POSIX :: Linux
     Programming Language :: Python
+    Programming Language :: Python :: Implementation :: CPython
+    Programming Language :: Python :: 3 :: Only
     Programming Language :: Python :: 3
     Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7
     Topic :: Internet :: Name Service (DNS)
 
-[global]
-setup-hooks =
-    pbr.hooks.setup_hook
-
 [files]
 packages =
     designateclient
@@ -100,14 +99,6 @@ openstack.dns.v2 =
     tsigkey_set = designateclient.v2.cli.tsigkeys:SetTSIGKeyCommand
     tsigkey_delete = designateclient.v2.cli.tsigkeys:DeleteTSIGKeyCommand
 
-
-[build_sphinx]
-builders = html,man
-all-files = 1
-warning-is-error = 1
-build-dir = doc/build
-source-dir = doc/source
-
 [egg_info]
 tag_build =
 tag_date = 0
@@ -127,9 +118,6 @@ keywords = _ gettext ngettext l_ lazy_gettext
 mapping_file = babel.cfg
 output_file = designateclient/locale/designateclient.pot
 
-[wheel]
-universal = 1
-
 [pbr]
 autodoc_index_modules = True
 api_doc_dir = reference/api

setup.py

@@ -13,17 +13,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-# THIS FILE IS MANAGED BY THE GLOBAL REQUIREMENTS REPO - DO NOT EDIT
 import setuptools
 
-# In python < 2.7.4, a lazy loading of package `pbr` will break
-# setuptools if some other modules registered functions in `atexit`.
-# solution from: http://bugs.python.org/issue15881#msg170215
-try:
-    import multiprocessing  # noqa
-except ImportError:
-    pass
-
 setuptools.setup(
     setup_requires=['pbr>=2.0.0'],
     pbr=True)