Remove run-tests and py3-run-tests

We have standard jobs for doing unittests under python2 and python3 -
namely, the builtin tox environments py27 and py35. Just use those and
remove the locally defined jobs.

Depends-On: I6d7a96adf5cfb075f5a2ffbd089ccbb883a1c1b4
Change-Id: I0cc0c07daafba331a64861c134029e443ba2aa8d

.zuul.yaml

@@ -4,21 +4,6 @@
       - name: primary
         label: ubuntu-xenial
 
-- job:
-    name: devstack-gate-tox-run-tests
-    parent: openstack-tox
-    description: |
-      Run tests using ``run-tests`` environment.
-    vars:
-      tox_envlist: run-tests
-
-- job:
-    name: devstack-gate-tox-py3-run-tests
-    parent: openstack-tox
-    description: |
-      Run tests using ``py3-run-tests`` environment.
-    vars:
-      tox_envlist: py3-run-tests
 
 - project:
     name: openstack-infra/devstack-gate
@@ -27,13 +12,3 @@
         - devstack:
             files:
               - ^roles/
-        - openstack-tox-py27
-        - openstack-tox-py35
-        - devstack-gate-tox-run-tests
-        - devstack-gate-tox-py3-run-tests
-    gate:
-      jobs:
-        - openstack-tox-py27
-        - openstack-tox-py35
-        - devstack-gate-tox-run-tests
-        - devstack-gate-tox-py3-run-tests

tox.ini

@@ -10,13 +10,6 @@ deps = -r{toxinidir}/test-requirements.txt
 commands =
   bash -c "./run-tests.sh"
 
-[testenv:run-tests]
-deps = -r{toxinidir}/test-requirements.txt
-
-[testenv:py3-run-tests]
-basepython = python3
-deps = -r{toxinidir}/test-requirements.txt
-
 [testenv:bashate]
 deps=
   {env:BASHATE_INSTALL_PATH:bashate==0.5.0}