no longer need 3 suffix on travis, tox

.travis.yml

@@ -15,5 +15,4 b' before_install:'
 install:
     - python setup.py install -q 
 script:
-    - if [[ $TRAVIS_PYTHON_VERSION == '2.'* ]]; then cd /tmp; iptest; fi
-    - if [[ $TRAVIS_PYTHON_VERSION == '3.'* ]]; then cd /tmp; iptest3; fi
+    - cd /tmp && iptest

tox.ini

@@ -22,8 +22,3 b' commands ='
     # See also: https://github.com/zeromq/pyzmq
     easy_install -q pyzmq
     iptest --all
-
-[testenv:py33]
-commands =
-    easy_install -q pyzmq
-    iptest3 --all