Revert "include osx in travis build"

.travis.yml

@@ -1,20 +1,14 @@
+language: python
+python:
+  - "2.7"
 
-matrix:
+addons:
-  include:
+  apt:
-    - os: osx
+    packages:
-      language: generic
+    - cmake
-      before_install:
+    - pyqt4-dev-tools
-        - brew update
-        - brew install libxml2 qt qt4 pyqt5
-    - os: linux
-      dist: trusty
-      sudo: required
-      language: python
-      python: 2.7
-      addons:
-        apt:
-          packages:
-            - cmake
-            - pyqt4-dev-tools
 
+# command to install dependencies
+#install: "pip install --user -r requirements.txt"
+# command to run tests
 script: make all