remove reliance on branch of crayfish-commons since PR has been merged

.travis.yml

@@ -34,7 +34,6 @@ install:
   - cd $DRUPAL_DIR;
   - chmod -R u+w web/sites/default
   - COMPOSER_MEMORY_LIMIT=-1 php -d memory_limit=-1 $COMPOSER_PATH config repositories.local path "$TRAVIS_BUILD_DIR"
-  - COMPOSER_MEMORY_LIMIT=-1 php -d memory_limit=-1 $COMPOSER_PATH require "islandora/crayfish-commons:dev-downgrade-symfony as dev-dev" --update-with-all-dependencies
   - COMPOSER_MEMORY_LIMIT=-1 php -d memory_limit=-1 $COMPOSER_PATH require "islandora/islandora:dev-travis-testing as dev-8.x-1.x" --prefer-source --update-with-all-dependencies
   - cd web
   - drush --uri=127.0.0.1:8282 en -y islandora_audio islandora_breadcrumbs islandora_iiif islandora_image islandora_video islandora_text_extraction_defaults