Remove macOS from Travis matrix

Resolves #2

Author: RazerM

.travis.yml

@@ -16,16 +16,6 @@ matrix:
     - os: linux
       language: generic
       env: USE_PYPY_RELEASE_VERSION=5.9-beta
-    # Uncomment if you want to test on pypy nightly
-    # - os: linux
-    #   language: generic
-    #   env: USE_PYPY_NIGHTLY=1
-    - os: osx
-      language: generic
-      env: MACPYTHON=3.5.4
-    - os: osx
-      language: generic
-      env: MACPYTHON=3.6.3
     - os: linux
       language: python
       python: 3.6