Remove unsupported options

Author: junk0612

.travis.yml

@@ -10,6 +10,6 @@ matrix:
   allow_failures:
     - rvm: ruby-head
 script:
-  - RAILS_ENV=test bundle exec rake db:migrate --trace
+  - RAILS_ENV=test bundle exec rake db:migrate
   - bundle exec rake db:test:prepare
   - bundle exec rspec spec/