Revert "Try to fix travis CI"

This reverts commit dd0e5f8442.

.travis.yml

@@ -8,10 +8,6 @@ before_script:
   - composer self-update
   - composer install --no-interaction
   - php artisan key:generate
-  - php artisan migrate:refresh
-  - php artisan passport:install
-  - php artisan storage:link
-  - php artisan config:cache
 
 script:
 - vendor/bin/phpunit