save some jobs when running builds on Travis

Author: xabbuh

.travis.yml

@@ -1,9 +1,7 @@
 language: php
 
 php:
-  - 5.3
   - 5.4
-  - 5.5
   - 5.6
   - 7.0
   - hhvm
@@ -32,8 +30,6 @@ matrix:
       env: SYMFONY_VERSION=2.7.*
     - php: 5.5
       env: SYMFONY_VERSION=2.8.*
-    - php: 5.5
-      env: SYMFONY_VERSION=3.0.*
 
 before_install:
   - composer self-update