Test without the cache directory

Author: Nyholm

.travis.yml

@@ -37,7 +37,3 @@ script:
 after_success:
   - if [[ "$COVERAGE" = true ]]; then wget https://scrutinizer-ci.com/ocular.phar; fi
   - if [[ "$COVERAGE" = true ]]; then php ocular.phar code-coverage:upload --format=php-clover build/coverage.xml; fi
-
-cache:
-  directories:
-    - $COMPOSER_CACHE_DIR