Merge pull request #1003 from edx/han/fix-travis

removing npm

.travis.yml

@@ -6,11 +6,10 @@ install:
   - "sudo apt-get install -y npm python-demjson"
   - "pip install --allow-all-external -r requirements.txt"
   - "pip install --allow-all-external demjson"
-  - "sudo npm install -g js-yaml"
 script:
   - |
     for yml in $(find . -name "*.yml"); do
-      js-yaml $yml >/dev/null
+      python -c "import sys,yaml; yaml.load(open(sys.argv[1]))" $yml >/dev/null
       if [[ $? -ne 0 ]]; then
         echo "ERROR parsing $yml"
         exit 1