disable Xdebug when not needed

Author: xabbuh

.travis.yml

@@ -39,6 +39,7 @@ matrix:
     - php: hhvm
 
 before_script:
+  - if [ "$TRAVIS_PHP_VERSION" != "hhvm" ]; then phpenv config-rm xdebug.ini; fi
   - if [ "$SYMFONY_VERSION" != "" ]; then composer require --no-update "symfony/dependency-injection:${SYMFONY_VERSION}"; fi
   - if [ "$PHPUNIT_VERSION" != "" ]; then composer require --no-update "phpunit/phpunit:${PHPUNIT_VERSION}"; fi
   - if [ "$deps" = "low" ]; then composer update --prefer-lowest; fi