Update .travis.yml

Author: Nardberjean

.travis.yml

@@ -112,36 +112,33 @@ matrix:
     - SYMFONY_VERSION="2.3.*"
     - PHPUNIT=phpunit-5.7
     - TEST_LINT=`true`
-    - PHP_CS_FIXER=`true`
     - SENSIO_SECURITY=`true`
   - php: nightly
     env:
     - SYMFONY_VERSION="2.7.*"
     - PHPUNIT=phpunit-5.7
     - TEST_LINT=`true`
-    - PHP_CS_FIXER=`true`
     - SENSIO_SECURITY=`true`
   - php: nightly
     env:
     - SYMFONY_LTS="2"
     - PHPUNIT=phpunit-5.7
     - TEST_LINT=`true`
-    - PHP_CS_FIXER=`true`
     - SENSIO_SECURITY=`true`
   - php: nightly
     env:
     - SYMFONY_LTS="3"
     - PHPUNIT=phpunit-5.7
     - TEST_LINT=`true`
-    - PHP_CS_FIXER=`true`
     - SENSIO_SECURITY=`true`
   - php: nightly
     env:
     - SYMFONY_LTS="4.x-dev@dev"
     - PHPUNIT=phpunit-5.7
     - TEST_LINT=`true`
-    - PHP_CS_FIXER=`true`
     - SENSIO_SECURITY=`true`
+  allow_failures:
+  - php: nightly
 
 before_install:
 - source /etc/os-release ; echo $VERSION