travis: Disable Mac OS builds for now

Author: 1st1

.travis.yml

@@ -10,12 +10,12 @@ env:
 
 matrix:
     include:
-        - os: osx
-          osx_image: xcode7.2  # OS X 10.11
-          # Travis macOS env does not support Python yet,
-          # so we have to set things up manually in install.sh.
-          env: PYTHON_VERSION=3.5.2
-               PIP_USER=1
+#        - os: osx
+#          osx_image: xcode7.2  # OS X 10.11
+#          # Travis macOS env does not support Python yet,
+#          # so we have to set things up manually in install.sh.
+#          env: PYTHON_VERSION=3.5.2
+#               PIP_USER=1
 
         - os: linux
           dist: trusty