.travis.yml in romaji-0.2.3 vs .travis.yml in romaji-0.2.4

@@ -1,10 +1,9 @@
 sudo: false
 rvm:
 - 2.0
 - 2.1
 - 2.2
-- 2.3
 - ruby-head
 matrix:
   allow_failures:
     - rvm: ruby-head