Remove PHP 5.3.3 from Travis config

PHP 5.3.3 on Travis does not work with OpenSSL, thus I am removing this

Author: Florian Eckerstorfer

.travis.yml

@@ -4,7 +4,6 @@ sudo: false
 
 matrix:
   include:
-    - php: 5.3.3
     - php: 5.3
     - php: 5.4
     - php: 5.5