revert osx support

.travis.yml

 language: python
 sudo: false
-matrix:
-    include:
-        - os: linux
-          python: 2.7
-        - os: linux
-          python: 3.3
-        - os: linux
-          python: 3.4
-        - os: linux
-          python: 3.5
-        - os: linux
-          python: pypy
-        - os: linux
-          python: pypy3
-        - os: osx
-          language: generic
-          env: TERRYFY_PYTHON='homebrew 2'
-        - os: osx
-          language: generic
-          env: TERRYFY_PYTHON='macpython 3.4'
-        - os: osx
-          language: generic
-          env: TERRYFY_PYTHON='homebrew 3'
-before_install:
-    - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then git clone https://github.com/MacPython/terryfy; fi
-    - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then source terryfy/travis_tools.sh; fi
-    - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then get_python_environment $TERRYFY_PYTHON venv; fi
-    - if [[ "$TERRYFY_PYTHON" == "homebrew 3" ]]; then alias pip=`which pip3` ; fi
+python:
+    - 2.7
+    - 3.3
+    - 3.4
+    - pypy
 install:
     - pip install -U setuptools
     - python bootstrap.py