.travis.yml in response-0.0.3 vs .travis.yml in response-0.0.4

@@ -2,10 +2,9 @@
 before_install: gem install bundler
 script: bundle exec rake ci
 rvm:
   - 1.9.3
   - 2.0.0
-  - ruby-head
   - rbx-19mode
   - jruby-19mode
   - jruby-head
 matrix:
   allow_failures: