Merge pull request #1118 from jrobeson/patch-1

remove SYMFONY_VERSION env var from .travis.yml

.travis.yml

@@ -4,9 +4,6 @@ php:
   - 5.3
   # - 5.4
 
-env:
-  - SYMFONY_VERSION=origin/master
-
 before_script:
   - composer install --dev