Disable testing on Ruby 2.3

Yoran Brondsema · Yoran Brondsema · commit ff5ea68ed927 · 2016-06-05T19:47:52.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -9,7 +9,6 @@ rvm:
   - 2.0.0
   - 2.1
   - 2.2
-  - 2.3
   - jruby-19mode
   - jruby-head
   - rbx-2
