Remove support for Python 3.3

Change-Id: Ia4993cd36fa1573c3ac28abe08ea7c665a8332c0

setup.cfg

@@ -17,7 +17,6 @@ classifier =
     Programming Language :: Python :: 2.7
     Programming Language :: Python :: 2.6
     Programming Language :: Python :: 3
-    Programming Language :: Python :: 3.3
     Programming Language :: Python :: 3.4
 
 [files]

tox.ini

@@ -1,6 +1,6 @@
 [tox]
 minversion = 1.6
-envlist = py26,py27,py33,py34,pep8
+envlist = py26,py27,py34,pep8
 # NOTE(dhellmann): We cannot set skipdist=True
 # for oslo libraries because of the namespace package.
 #skipsdist = True
@@ -32,13 +32,6 @@ setenv =
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements-py3.txt
 
-[testenv:py33]
-setenv =
-   {[testenv]setenv}
-   OS_TEST_DBAPI_ADMIN_CONNECTION=mysql+pymysql://openstack_citest:openstack_citest@localhost/;postgresql://openstack_citest:openstack_citest@localhost/postgres;sqlite://
-deps = -r{toxinidir}/requirements.txt
-       -r{toxinidir}/test-requirements-py3.txt
-
 [testenv:pep8]
 commands = flake8