updating travis config

Author: Nyholm

.travis.yml

@@ -14,17 +14,15 @@ env:
 matrix:
   fast_finish: true
   allow_failures:
-    - hhvm
-    - php: 7.0
-      env: SYMFONY_VERSION=3.0.*
+    - php: hhvm
+    - env: SYMFONY_VERSION=3.0.*
   include:
     - php: 5.5
       env:
         - COMPOSER_FLAGS="--prefer-stable --prefer-lowest"
         - COVERAGE=true
         - TEST_COMMAND="composer test-ci"
-    - php: 5.6
-      env: SYMFONY_VERSION=2.7.*
+    - env: SYMFONY_VERSION=2.7.*
 
 before_install:
   - travis_retry composer self-update