.travis.yml in lookup_by-0.4.1 vs .travis.yml in lookup_by-0.5.0

@@ -1,10 +1,9 @@
 language: ruby
 rvm:
   - 1.9.3
   - 2.0.0
   - 2.1.1
-  - ruby-head
   - rbx
   - rbx-2.2.6
 services:
   - postgresql
 before_script: