Stop supporting python2

We're peeling python2 from libraries now, so Stop running python2
versions of test jobs. Leaving removing the test jobs themselves
for the moment as they're still used in other repos.

Change-Id: Ic6d56e3636b757201d83649f075005ed3ae1e1a6

.zuul.yaml

@@ -391,7 +391,6 @@
     templates:
       - check-requirements
       - openstack-lower-constraints-jobs
-      - openstack-python-jobs
       - openstack-python3-ussuri-jobs
       - openstacksdk-functional-tips
       - openstacksdk-tox-tips
@@ -414,7 +413,6 @@
             voting: false
         - openstacksdk-functional-devstack-ironic:
             voting: false
-        - openstacksdk-functional-devstack-python2
         - osc-functional-devstack-tips:
             voting: false
         - nodepool-functional-openstack-src
@@ -428,7 +426,6 @@
     gate:
       jobs:
         - openstacksdk-functional-devstack
-        - openstacksdk-functional-devstack-python2
         - openstacksdk-functional-devstack-networking
         - openstacksdk-functional-devstack-senlin
         - nodepool-functional-openstack-src

releasenotes/notes/drop-python27-b824f9ce51cb1ab7.yaml

@@ -0,0 +1,3 @@
+---
+prelude: >
+    As of this release, python v2 is neither tested nor supported.

setup.cfg

@@ -13,8 +13,6 @@ classifier =
     License :: OSI Approved :: Apache Software License
     Operating System :: POSIX :: Linux
     Programming Language :: Python
-    Programming Language :: Python :: 2
-    Programming Language :: Python :: 2.7
     Programming Language :: Python :: 3
     Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7

tox.ini

@@ -1,6 +1,6 @@
 [tox]
 minversion = 3.1
-envlist = pep8,py27,py37
+envlist = pep8,py37
 skipsdist = True
 ignore_basepython_conflict = True